Dear Paul Nearly all machine papers are whitened with Cornish China Clay. Up to 80% by weight in some cases. (Maybe that is why I'm not seeing as much metamarism. My walls are painted with the same stuff.)
Watercolour papers should not have Clay. They use pure cotton rags instead. The Somerset box has a picture of a cotton boll on the front. However there appears to be a varnish coat on the paper for inkjet printing. That is why results are better on "inkjet watercolour paper" than on the non inkjet stuff. Bob Croxford <<<there used to be a great paper about this at wilhelm-research.com, why not try dig it up? I think it's a bit more high tech than clay. He went into great detail about the Symbiotic relationship of inks and paper coatings. all the best neil>>> Actually the clay is technically Kaolin. Same stuff as in Milk of Magnesia. In a message dated 12/15/02 2:07:11 P paulbradforth.com writes: << > Does anyone know what the coating is that Somerset and others are > using to make watercolour papers into inkjet papers? I was told by > someone who experiments with old processes that water based > polyurethene varnish can be used! Isn't it good old Cornish china clay? I know it is on most of the non-textured papers... -- best wishes Paul >> =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
