If you're Making a Collagraph from Mat Board with Acrylic Gloss Varnish, be aware that labeling and ingredients have changed.
Belinda Del Pesco Fine Art Blog
How to make a Collagraph Print - Belinda Del Pesco
How to Make a Collagraph, and Print it in Full Color - Belinda Del
How to Make a Color Collagraph Print from Mat Board
All About Collagraph Printmaking
Sandragraphs
Making a Collagraph from Mat Board with Acrylic Gloss Varnish
All About Collagraph Printmaking Group
Technique: Mounting work on paper onto a panel - Sally Hirst
How to Make a Mat Board Collagraph Plate using Carborundum
All About Collagraph Printmaking
Art Studio Blog - Page 2 of 20 - Belinda Del Pesco
What I use to create my collagraph plates… so far! – Ink and Spirals