Bloom Nappy Barrier Cream

Details

The active in a nappy cream is zinc oxide, and the number next to it is the whole product. This one is 15.0 percent by recipe and assays 15.2 percent by EDTA complexometric titration on the finished cream. That figure is worth printing because the permitted range for zinc oxide as a skin protectant runs from 1 percent to 25 percent. So contains zinc oxide is a legal statement at 1 percent, where it forms no continuous film and does nothing much, and a great many nappy creams sit in the low single figures. Under-dosing is the cheat in this category and it is invisible from the front of the tube. Fifteen percent in a thick anhydrous base gives an opaque layer you can see on the skin, which is the only field test a parent has: if you cannot see it, it is not a barrier. The second thing zinc oxide brings is the reason for a test nobody expects. Zinc oxide is a mined and smelted material, and lead and cadmium travel with it. So the grade is specified as IP and every lot is run by ICP-MS for lead, arsenic, mercury and cadmium against the Cosmetics Rules 2020 limits. Particle size is measured rather than asserted: median 320 nm by laser diffraction with under 1 percent of particles below 100 nm by number, so the word non-nano here is a measurement. And there is no preservative in it, which is a claim that needs a number too. The recipe carries no water phase at all, including the calendula, which is an oil macerate rather than an aqueous extract. Water activity measures 0.32. Nothing microbial grows below 0.60, so the absence of a preservative here is a consequence of the formula rather than a decision to leave one out.

• Full INCI, in descending order: Butyrospermum Parkii (Shea) Butter, Helianthus Annuus (Sunflower) Seed Oil, Zinc Oxide, Cera Alba (Beeswax), Cocos Nucifera (Coconut) Oil, Calendula Officinalis Flower Extract, Silica, Tocopherol
• With percentages: Butyrospermum Parkii Butter 34.0, Helianthus Annuus Seed Oil 30.0, Zinc Oxide 15.0, Cera Alba 12.0, Cocos Nucifera Oil 6.0, Calendula Officinalis Flower Extract 2.0, Silica 0.5, Tocopherol 0.5, which totals 100.0. Eight things, and the active is third because two carriers are heavier than it, which is exactly why the percentage matters more than the position
• Zinc oxide assayed at 15.2 percent by EDTA complexometric titration on the finished cream, against the permitted 1 to 25 percent range for a skin protectant
• Non-nano, measured: median particle size 320 nm by laser diffraction, under 1 percent of particles below 100 nm by number, against the 50 percent threshold in the EU nanomaterial definition
• Zinc oxide to IP grade, with lead, arsenic, mercury and cadmium by ICP-MS per lot under the Cosmetics Rules 2020 limits. Zinc oxide is smelted, and those four ride in with it if the grade is not specified
• Water activity 0.32, measured. Below 0.60 nothing microbial grows, which is why there is no preservative and why that is a fact rather than a boast
• No talc. Not asbestos-free talc, none. And we do not sell a baby powder at all, in this house or any other. Talc is one reason. The second is separate and applies to cornflour powders too: any fine powder shaken near an infant's face can be inhaled, and that is a documented harm rather than a caution
• No petroleum jelly and no mineral oil, and MOSH and MOAH by LC-GC-FID below 1 mg per kg as the proof rather than the assertion
• Fragrance-free on skin that is already sore: no parfum, no essential oil, none of the 26 EU declarable components. Phthalates by GC-MS, six esters, none detected
• Honest trade-off one: it is thick and it is meant to be. Spreading it takes effort and it does not vanish into the skin, because a barrier that sinks in has stopped being a barrier
• Honest trade-off two, and this corrects what we used to say: a zinc and beeswax barrier does build up in cloth nappies and reduces how much they absorb. Use a disposable or fleece liner with cloth. Stripping the build-up afterwards is a chore nobody should be signed up for by accident
• Honest trade-off three: an anhydrous cream cannot grow anything on its own, but a finger dipped in eight times a day introduces what a finger carries. Use a clean finger or a spatula, and finish an opened tub within 12 months
• When a barrier cream is the wrong answer: if the rash is bright red with small satellite spots and sits deep in the skin creases, that is likely a yeast, and no thickness of zinc will clear it. It needs an antifungal from a doctor. If redness does not settle in two or three days, or spreads, see your paediatrician rather than reaching for a thicker cream