How to avoid fatty spew on leather? Download our free whitepaper on fatty spew and learn about its background, where it comes from, and what can be done to prevent its formation. On processed leathers it is sometimes observed that, over time, an undesired white milky film appears on top of the leather. This white layer often gives rise to debates on its origin and causes, and in some cases leads to a claim for damages. The phenomenon described is called ‘fatty spew’. The possible sources of fatty spew may be of diverse nature, they are similar in one respect. They always originate from high melting point substances. Download the whitepaper ‘Fatty Spew’ My email address** First name**Last name**Company name**Stay informed Please keep me informed about the latest news on Royal Smit & Zoon and the leather industry.Consent* I have read and accepted the Terms & conditions and Privacy Statement.CommentsThis field is for validation purposes and should be left unchanged. Δ What is fatty spew? All fats have a tendency to migrate through the leather when they are not irreversibly fixed to the matrix. Free saturated fatty acids, as all other substances, are sensitive to the influence of temperature. One of temperature’s effects is that it can change a substance’s appearance. The reason for the white layer on the grain is the high melting point, which is about 60°C to 70°C for all of the substances causing fatty spew. Below this temperature they begin to solidify but remain undetectable to the eye. Interesting for you Discover more on Wet End Renewable chemicals: replacing fossil-based by biobased ingredients What biobased materials can be used to replace petrochemicals? Discover our alternatives and criteria. Vegan leather, it is mostly a nonsense name. A marketing phrase. In a recent article published in the Volkskrant, one of the leading Dutch quality newspapers, leather is being compared to so called sustainable alternatives. A well-founded commentary to a, often, misleading narrative. A Perfect Model of Circularity: Return To Nature collection by Anya Hindmarch Fashion game-changer Anya Hindmarch has created a leather bag collection that can decompose back to earth. The bags have been designed to be capable of degrading naturally – from earth, to cow, to bag, to earth and on again in a model of perfect circularity. Wet End Discover Stay informed Receive the latest company news and industry updates Subscribe Share this:
