Non-toxic - Organic - Neutral pH - Acid-free - Yes! Paste is a white (clear when dry), non-toxic, slow to set water-based/Dextrin-based paste that is used for long lasting archival mounting on almost all artist papers. This acid-free, neutral pH paste will not react with air against paper. It is completely organic and can be thinned with warm water. It is ideal for conservation of art and will not stain delicate watercolors. Use also with tin, cloth, leather, metal and primed surfaces. Yes! Paste is also excellent for decoupage and collage work.