https://www.artsupplies.co.uk/info.php?topic=211#Varnish_Tips___Techniques
Varnishes are used to protect the finished painting. Picture varnishes should be removable so that paintings can be cleaned when they have become dirty.
There are two important things to remember about varnishes:
• Don’t varnish too early, even the thinnest oil painting should be allowed to dry for 6 months. A minimum of one month is required for thin Griffin alkyd paintings.
• Don’t use varnishes as mediums, this would make the painting sensitive to solvent. An attempt to clean it in the future may remove the painting instead!
Post time: Jun-14-2017