Education

Decoding labels and ISO 16128 standards.

Meet Sphaera. The brand that’s redefining modern, sustainable haircare.

Gels, acrylics, SNS and nail polish; what's the difference?

Ingredient highlight: What goes into our Eye-Fi Liner.

Our latest launch of Eye-Fi Liners pack benchmark-busting, skin-loving results and it’s all thanks to their natural ingredients.

Why the COSMOS-Standard is important for beauty standards everywhere

Ahh the cosmos, so filled with mystery and marvel.

Natural eyeliner now comes in high-definition

We’ve been carefully crafting this formula to bring you smooth, lovingly, long-lasting eyeliners that not only look the part but act the part using 100% natural ingredients.

How to find the best lipsticks based on your skin tone

We’ve devised a neat little quiz to help you find out by the end of this blog.

5 Steps to Mastering the Bold Red Lip

From Cleopatra to Marilyn Monroe, the bold red lip has served queens for centuries.

Vegan Cosmetics 101

If you’re not eating it or wearing it, what does our makeup have to do with veganism?

How to find the best nail shape for your hands

When you look a little closer to home, you’ll soon realise that the best nail shape for you, lies in your hands.

6 reasons your nails want breathable nail polish

What if your manicure could make your nails healthier? Sound too good to be true?

The only nail care regimen you need

Whoever invented #SelfCareSundays wasn’t thinking big enough. Consider this your guide to restoring dry or damaged nails - every single day.

Everything you need to know about cosmetics labels – and why they matter

When it comes to the icons on your cosmetics labels, we’ve got you covered.

How to get healthy nails

Keep your nails looking fancy fresh year-round with some of our top nail care tips.

Wedding nails: 8 fresh nail ideas that aren’t a French Manicure

So, here you are, marrying the love of your life. You can’t quite believe it.

The 5 best foods for healthy nails

Diet plays a huge part in our wellbeing, but did you also know that our diet affects our nails as well?

How to choose the perfect red nail polish for your skin tone

Red nails: classic. But with so many shades of red in the rainbow, how do you choose the right one for you?

Healthy nails according to Chinese medicine

Chinese medicine believes your nails are the external reflection of an internal condition.

Kester Black’s Better Beauty Growth Plan

Here at Kester Black, sustainability and social justice aren’t just glossy marketing buzzwords.

How to fix gluggy nail polish

Waste not want not, beauties. We’ll show you how to thin out your nail polish and extend its life.

How to care for your cuticles

Your cuticles are the keepers of your nail health. But what are they, and where are they?

How to fix and prevent yellow nails for good

The betrayal is real. Your favourite dark polish has left you with yellowy nails. How could it do this to you?

What is water permeable nail polish?

Once applied to nails, our water permeable formula allows water penetration on a molecular level.

How to choose the best neutral nail polish for your skin tone

Understated, sophisticated and effortlessly stylish - neutral tones will always be in vogue.

The story behind the name Kester Black

While this totally sounds like a fever-dream, it’s how Anna came up with the name of our kind little brand.

What is 12-Free nail polish?

The truth is, there’s actually no way to make a completely chemical-free nail polish.