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Goldwell Kerasilk Control Smoothing Fluid is part of a new collection of products introduced this month that aim to tame frizz and smooth the hair with ingredients like silk and glyoxylic acid.

Glyoxylide, according to Dr. Koch, is the "internal anhydride" of glyoxylic acid.

Chemists know all about glyoxylic acid, but they never heard of anybody having isolated its internal anhydride.

Artificial syntheses of amino-acids, by the action of ammonia upon glyoxylic acid and sorbic acid, both of which occur in plants and may be obtained by the oxidation of simple sugars, have been accomplished, and it seems probable that similar reactions in the plant protoplasm may give rise to the various amino-acids which unite together to form proteins.

Add glyoxylic acid solution and run in concentrated sulphuric acid.