BRUSH ON BLOCK Sunscreen
BRUSH ON BLOCK

Sunscreen

BRUSH ON BLOCK® is a broad spectrum SPF 30 natural and portable, mineral powder sunscreen with no chemical sunscreen ingredients.
Uploaded by: gabriela on 20/07/2018

Ingredients overview

Mica
A mineral powder used to improve skin feel, increase product slip, give the product some light-reflecting properties, enhance skin adhesion or serve as an anti-caking agent. A real multi-tasker. [more]
,
Titanium Dioxide
what‑it‑does sunscreen
A physical/inorganic sunscreen with pretty broad spectrum (UVB and UVA II, less good at UVA I) protection and good stability. Might leave some whitish tint on the skin, though. [more]
,
Zinc Oxide
what‑it‑does sunscreen
A physical/inorganic sunscreen with the broadest spectrum (UVB and UVA II, less good at UVA I) protection available today. It also has good stability and also works as a skin protectant, anti-irritant. Might leave some whitish tint on the skin, though. [more]
,
Silica
what‑it‑does viscosity controlling | abrasive/scrub
A white powdery thing that can mattify the skin and thicken up cosmetic products. [more]
,
Boron Nitride, Dimethylimidazolidinone Rice Starch
what‑it‑does viscosity controlling
,
Stearic Acid
what‑it‑does emulsifying | emollient | viscosity controlling
irritancy, com. 0 2
A common multi-tasker fatty acid that works as an emollient, emulsifier and thickener. [more]
,
Alumina
what‑it‑does viscosity controlling
A multi-functional helper ingredient that's used mainly as a pigment carrier helping pigments in mineral sunscreens and color cosmetics to flow freely and evenly and not to clump. [more]
,
Camellia Oleifera Leaf Extract
what‑it‑does antioxidant | soothing
A type of green tea that has antioxidants and anti-inflammatory properties. [more]
, [more]
Carthamus Tinctorius Seed Oil
what‑it‑does antioxidant | emollient
Safflower Seed Oil - emollient plant oil with moisturizing fatty acids (linoleic: 70%, oleic: 11%) and antioxidant vitamin E (44mg/100g alpha-tocopherol). [more]
,
Chamomilla Recutita Flower Extract
what‑it‑does soothing | antioxidant
Chamomile extract - has great anti-inflammatory and some antioxidant properties. [more]
,
Lonicera Caprifolium Flower Extract
what‑it‑does perfuming
,
Lonicera Japonica Flower Extract
what‑it‑does preservative
A white-flowered honeysuckle that contains a natural form of paraben called parahydroxy benzoic acid (PHBA) and serves as a broad-spectrum antimicrobial preservative. [more]
,
Oryza Sativa Lipids, Simmondsia Chinensis Seed Oil
what‑it‑does emollient
Jojoba oil - a wax ester (chemically not a real oil), that's very similar to human sebum. It's uniquely excellent at helping the skin with its protective barrier and helping it to stay moisturized. [more]
,
Triethoxycaprylylsilane
A clear, light yellow liquid that is used to coat pigments (such as inorganic sunscreen agents or colorants) in cosmetic products.  [more]
,
[+/-:Ci 77491
what‑it‑does colorant
Iron Oxide - a super common colorant with the color red. 
,
Ci 77492
what‑it‑does colorant
CI 77492 or Iron Oxide is a common colorant with the color yellow. 
,
Ci 77499
what‑it‑does colorant
CI 77499 or Iron Oxide is a super common colorant with the color black. 
,
Ci 77891]
what‑it‑does colorant
Titanium dioxide as a colorant. It's a white pigment with great color consistency and dispersibility.
[less]
Alumina, Boron Nitride, Chamomile Flower Extract, Green Tea Extract, Honeysuckle Flower Extract, Iron Oxides, Mica, Rice Lipids, Rice Starch, Safflower Oil, Silica, Stearic Acid, Triethoxycaprylsilane

Highlights

Key Ingredients

Antioxidant: Camellia Oleifera Leaf Extract
what‑it‑does antioxidant | soothing
A type of green tea that has antioxidants and anti-inflammatory properties. [more]
,
Carthamus Tinctorius Seed Oil
what‑it‑does antioxidant | emollient
Safflower Seed Oil - emollient plant oil with moisturizing fatty acids (linoleic: 70%, oleic: 11%) and antioxidant vitamin E (44mg/100g alpha-tocopherol). [more]
,
Chamomilla Recutita Flower Extract
what‑it‑does soothing | antioxidant
Chamomile extract - has great anti-inflammatory and some antioxidant properties. [more]
Soothing: Camellia Oleifera Leaf Extract
what‑it‑does antioxidant | soothing
A type of green tea that has antioxidants and anti-inflammatory properties. [more]
,
Chamomilla Recutita Flower Extract
what‑it‑does soothing | antioxidant
Chamomile extract - has great anti-inflammatory and some antioxidant properties. [more]
Sunscreen: Titanium Dioxide
what‑it‑does sunscreen
A physical/inorganic sunscreen with pretty broad spectrum (UVB and UVA II, less good at UVA I) protection and good stability. Might leave some whitish tint on the skin, though. [more]
,
Zinc Oxide
what‑it‑does sunscreen
A physical/inorganic sunscreen with the broadest spectrum (UVB and UVA II, less good at UVA I) protection available today. It also has good stability and also works as a skin protectant, anti-irritant. Might leave some whitish tint on the skin, though. [more]

Show all ingredients by function

Other Ingredients

Abrasive/scrub: Silica
what‑it‑does viscosity controlling | abrasive/scrub
A white powdery thing that can mattify the skin and thicken up cosmetic products. [more]
Colorant: [+/-:Ci 77491
what‑it‑does colorant
Iron Oxide - a super common colorant with the color red. 
,
Ci 77492
what‑it‑does colorant
CI 77492 or Iron Oxide is a common colorant with the color yellow. 
,
Ci 77499
what‑it‑does colorant
CI 77499 or Iron Oxide is a super common colorant with the color black. 
,
Ci 77891]
what‑it‑does colorant
Titanium dioxide as a colorant. It's a white pigment with great color consistency and dispersibility.
Emollient: Stearic Acid
what‑it‑does emulsifying | emollient | viscosity controlling
irritancy, com. 0 2
A common multi-tasker fatty acid that works as an emollient, emulsifier and thickener. [more]
,
Carthamus Tinctorius Seed Oil
what‑it‑does antioxidant | emollient
Safflower Seed Oil - emollient plant oil with moisturizing fatty acids (linoleic: 70%, oleic: 11%) and antioxidant vitamin E (44mg/100g alpha-tocopherol). [more]
,
Simmondsia Chinensis Seed Oil
what‑it‑does emollient
Jojoba oil - a wax ester (chemically not a real oil), that's very similar to human sebum. It's uniquely excellent at helping the skin with its protective barrier and helping it to stay moisturized. [more]
Emulsifying: Stearic Acid
what‑it‑does emulsifying | emollient | viscosity controlling
irritancy, com. 0 2
A common multi-tasker fatty acid that works as an emollient, emulsifier and thickener. [more]
Preservative: Lonicera Japonica Flower Extract
what‑it‑does preservative
A white-flowered honeysuckle that contains a natural form of paraben called parahydroxy benzoic acid (PHBA) and serves as a broad-spectrum antimicrobial preservative. [more]
Viscosity controlling: Silica
what‑it‑does viscosity controlling | abrasive/scrub
A white powdery thing that can mattify the skin and thicken up cosmetic products. [more]
,
Dimethylimidazolidinone Rice Starch
what‑it‑does viscosity controlling
,
Stearic Acid
what‑it‑does emulsifying | emollient | viscosity controlling
irritancy, com. 0 2
A common multi-tasker fatty acid that works as an emollient, emulsifier and thickener. [more]
,
Alumina
what‑it‑does viscosity controlling
A multi-functional helper ingredient that's used mainly as a pigment carrier helping pigments in mineral sunscreens and color cosmetics to flow freely and evenly and not to clump. [more]

Ingredients explained

Also-called: CI 77019

A super versatile and common mineral powder that comes in different particle sizes. It is a multi-tasker used to improve skin feel, increase product slip, give the product some light-reflecting properties, enhance skin adhesion or serve as an anti-caking agent. Popular both in makeup and in skin care products. 

Titanium Dioxide - goodie
What-it-does: sunscreen

Titanium Dioxide is one of the two members of the elite sunscreen group called physical sunscreens (or inorganic sunscreens if you’re a science geek and want to be precise).

Traditionally, UV-filters are categorized as either chemical or physical. The big difference is supposed to be that chemical agents absorb UV-light while physical agents reflect it like a bunch of mini umbrellas on top of the skin. While this categorization is easy and logical it turns out it's not true. A recent, 2016 study shows that inorganic sunscreens work mostly by absorption, just like chemical filters, and only a little bit by reflection (they do reflect the light in the visible spectrum, but mostly absorb in the UV spectrum).

Expand to read more

Anyway, it doesn't matter if it reflects or absorbs, Titanium Dioxide is a pretty awesome sunscreen agent for two main reasons: it gives a nice broad spectrum coverage and it's highly stable. Its protection is very good between 290 - 350 nm (UVB and UVA II range), and less good at 350-400 nm (UVA I) range. Regular sized Titanium Dioxide also has a great safety profile, it's non-irritating and is pretty much free from any health concerns (like estrogenic effect worries with some chemical filters).

The disadvantage of Titanium Dioxide is that it's not cosmetically elegant, meaning it's a white, "unspreadable" mess. Sunscreens containing Titanium Dioxide are often hard to spread on the skin and they leave a disturbing whitish tint. The cosmetic industry is, of course, really trying to solve this problem and the best solution so far is using nanoparticles. The itsy-bitsy Nano-sized particles improve both spreadability and reduce the whitish tint a lot, but unfortunately, it also introduces new health concerns. 

The main concern with nanoparticles is that they are so tiny that they are absorbed into the skin more than we want them (ideally sunscreen should remain on the surface of the skin). Once absorbed they might form unwanted complexes with proteins and they might promote the formation of evil free radicals. But do not panic, these are concerns under investigation. A 2009 review article about the safety of nanoparticles summarizes this, "to date, in-vivo and in-vitro studies have not demonstrated percutaneous penetration of nanosized particles in titanium dioxide and zinc oxide sunscreens". The English translation is, so far it looks like sunscreens with nanoparticles do stay on the surface of the skin where they should be.  

All in all, Titanium Dioxide is a famous sunscreen agent and for good reason, it gives broad spectrum UV protection (best at UVB and UVA II), it's highly stable, and it has a good safety profile. It's definitely one of the best UV-filter agents we have today, especially in the US where new-generation Tinosorb filters are not (yet) approved. 

Zinc Oxide - goodie
What-it-does: sunscreen

When it comes to sunscreen agents, Zinc Oxide is pretty much in a league of its own. It's a physical (or inorganic) sunscreen that has a lot in common with fellow inorganic sunscreen Titanium Dioxide (TiO2) but a couple of things make it superior even to TiO2.

If physical sunscreens don't tell you anything, go ahead and read about the basics here. Most of what we wrote about Titanium Dioxide is also true for Zinc Oxide so we will focus here on the differences. 

Expand to read more

The first main difference is that while TiO2 gives a nice broad spectrum protection, Zinc Oxide has an even nicer and even broader spectrum protection. It protects against UVB, UVA II, and UVA I almost uniformly, and is considered to be the broadest range sunscreen available today

It's also highly stable and non-irritating. So much so that Zinc Oxide also counts as a skin protectant and anti-irritant. It's also often used to treat skin irritations such as diaper rash.

As for the disadvantages, Zinc Oxide is also not cosmetically elegant. It leaves a disturbing whitish tint on the skin, although, according to a 2000 research paper by Dr. Pinnell, it's slightly less white than TiO2. Still, it's white and disturbing enough to use Zinc Oxide nanoparticles more and more often. 

We wrote more about nanoparticles and the concerns around them here, but the gist is that if nanoparticles were absorbed into the skin that would be a reason for legitimate health concerns. But luckily, so far research shows that sunscreen nanoparticles are not absorbed but remain on the surface of the skin or in the uppermost (dead) layer of the skin. This seems to be true even if the skin is damaged, for example, sunburnt. 

All in all, if you've found a Zinc Oxide sunscreen that you are happy to use every single day, that's fantastic and we suggest you stick with it. It's definitely one of the best, or probably even the best option out there for sun protection available worldwide. 

A white powdery thing that's the major component of glass and sand. In cosmetics, it’s often in products that are supposed to keep your skin matte as it has great oil-absorbing abilities. It’s also used as a helper ingredient to thicken up products or suspend insoluble particles. 

What-it-does: absorbent/mattifier

We don't have description for this ingredient yet.

We don't have description for this ingredient yet.

What-it-does: emulsifying, emollient, viscosity controlling | Irritancy: 0 | Comedogenicity: 2

A common multi-tasker fatty acid. It helps water and oil to mix (emulsifier), it makes your skin feel smooth (emollient) and can help to thicken up products.

Also-called: Aluminum Oxide, Al2O3 | What-it-does: viscosity controlling, absorbent/mattifier

A multi-functional helper ingredient that's used mainly as a pigment carrier.  The pigment can be an inorganic sunscreen (such as titanium dioxide) or a colorant that is blended with alumina platelets and then often coated with some kind of silicone (such as triethoxycaprylylsilane). This special treatment enables pigments to be evenly dispersed in the formula and to be spread out easily and evenly upon application. It is super useful both for mineral sunscreens as well as for makeup products. 

Other than that, alumina can also be used as an absorbent (sometimes combined with the mattifying powder called polymethylsilsesquioxane), a viscosity controlling or an opacifying (reduces the transparency of the formula) agent.

Also-called: tea oil camellia | What-it-does: antioxidant, soothing

Camellia Oleifera is a type of green tea plant that's mostly known for the oil that comes from its seeds. As for the leaves, it has similar properties as the better known and more often used Camellia Sinensis leaves. You can read all the geeky details about green tea  and why it's awesome by clicking here, but in short, it has antioxidants and anti-inflammatory magic properties.

Also-called: Safflower Seed Oil | What-it-does: antioxidant, emollient

The oil coming from the seeds of the yellow flowered safflower plant. Similar to other plant oils, it's loaded with nourishing and moisturizing fatty acids: it's a high linoleic acid oil (70%) and has only smaller amounts of oleic acid (11%) (this might be great for acne-prone skin). It also contains antioxidant vitamin E (44mg/100g alpha-tocopherol).

Also-called: German Chamomile Flower Extract | What-it-does: soothing, antioxidant

Chamomile probably needs no introduction as it's one of the most widely used medicinal herbs. You probably drink it regularly as a nice, calming cup of tea and it's also a regular on skincare ingredient lists.

Cosmetic companies use it mainly for its anti-inflammatory properties. It contains the terpenoids chamazulene and bisabolol both of which show great anti-inflammatory action in animal studies. On top of that chamomile also has some antioxidant activity (thanks to some other active ingredients called matricine, apigenin and luteolin).  

Expand to read more

Though chamomile is usually a goodie for the skin, it's also not uncommon to have an allergic reaction to it. 

What-it-does: perfuming

We don't have description for this ingredient yet.

Also-called: Japanese Honeysuckle Flower Extract | What-it-does: preservative

A white-flowered honeysuckle that contains a natural form of paraben called parahydroxy benzoic acid (PHBA) and serves as a broad-spectrum antimicrobial preservative. Yep, it's paraben in disguise. We have written about it more at the Italian Honeysuckle.

We don't have description for this ingredient yet.

Also-called: Jojoba Oil | What-it-does: emollient

Jojoba is a drought resistant evergreen shrub native to South-western North America. It's known and grown for jojoba oil, the golden yellow liquid coming from the seeds (about 50% of the weight of the seeds will be oil).  

At first glance, it seems like your average emollient plant oil: it looks like an oil and it's nourishing and moisturizing to the skin but if we dig a bit deeper, it turns out that jojoba oil is really special and unique: technically - or rather chemically - it's not an oil but a wax ester (and calling it an oil is kind of sloppy). 

Expand to read more

So what the heck is a wax ester and why is that important anyway? Well, to understand what a wax ester is, you first have to know that oils are chemically triglycerides: one glycerin + three fatty acids attached to it. The fatty acids attached to the glycerin vary and thus we have many kinds of oils, but they are all triglycerides. Mother Nature created triglycerides to be easily hydrolyzed (be broken down to a glycerin + 3 fatty acid molecules) and oxidized (the fatty acid is broken down into small parts) - this happens basically when we eat fats or oils and our body generates energy from it.

Mother Nature also created wax esters but for a totally different purpose. Chemically, a wax ester is a fatty acid + a fatty alcohol, one long molecule. Wax esters are on the outer surface of several plant leaves to give them environmental protection. 25-30% of human sebum is also wax esters to give us people environmental protection. 

So being a wax ester results in a couple of unique properties: First, jojoba oil is extremely stable. Like crazy stable. Even if you heat it to 370 C (698 F) for 96 hours, it does not budge. (Many plant oils tend to go off pretty quickly). If you have some pure jojoba oil at home, you should be fine using it for years. 

Second, jojoba oil is the most similar to human sebum (both being wax esters), and the two are completely miscible. Acne.org has this not fully proven theory that thanks to this, jojoba might be able to "trick" the skin into thinking it has already produced enough sebum, so it might have "skin balancing" properties for oily skin.

Third, jojoba oil moisturizes the skin through a unique dual action: on the one hand, it mixes with sebum and forms a thin, non-greasy, semi-occlusive layer; on the other hand, it absorbs into the skin through pores and hair follicles then diffuses into the intercellular spaces of the outer layer of the skin to make it soft and supple.

On balance, the point is this: in contrast to real plant oils, wax esters were designed by Mother Nature to stay on the surface and form a protective, moisturizing barrier and jojoba oil being a wax ester is uniquely excellent at doing that.

A clear, light yellow liquid that is used to coat pigments (such as inorganic sunscreen agents or colorants) in cosmetic products.  The coating helps to stabilize pigments in the formulas and also helps them to spread easily and evenly on the skin. 

Also-called: Iron Oxide Red | What-it-does: colorant

CI 77491 or Iron Oxide is a super common colorant  with the color red. 

Also-called: Iron Oxide Yellow | What-it-does: colorant

CI 77492 or Iron Oxide is a common colorant with the pigment yellow.

Also-called: Iron Oxide Black | What-it-does: colorant

CI 77499 or Iron Oxide is a super common colorant with the color black. 

Also-called: titanium dioxide/ci 77891 | What-it-does: colorant

Ci 77891 is the color code of titanium dioxide. It's a white pigment with great color consistency and dispersibility.

You may also want to take a look at...