I recently had a course at school were we explored different kinds of paints and made our own acrylics,tempera,casein and oil paints. Anyway – our teacher said we did not have to grind the pigments when mixing it with the pva binder, it was enough to just mix the pva binder with the pigments accourding to him.-We however had to grind the pigments in the linseed oil when we made oil paints. I asked him why one does not have to do the same when making acrylics, and I don`t think he was particularly clear in his answer.
Anyway I made my own acrylics “ blending” the pigments directly with the pva binder, and I discovered that my “self made” acrylics had a glowing vitality and was semi shiny, and different to the acrylic I`ve used before(I think it might have something to do with the pva binder) – Anyway the paintfilm seems to be cracking, so I was wondering if anybody knows of any additives one can include “in the mix” to make the acrylic film more flexible ( when making/grinding ones own acrylics ) Do one include “ingredients” other than pigments and binder when making or manufacturing acrylics?
+We had access to genuine cadmium red pigments. I don`t really feel comfortable handling heavy metals in pigment form. Is it enough protection using rubber gloves and a dust mask?
Different manufacturers do make “ acrylic varnishes”, but I asked my teacher if one could varnish pictures painted with acrylics with dammar varnish, and he confirmed this. “ Is it true?” – Why would manufactures bother with making special acryl varnishes if they could manage with e.g.dammar. Maybe the acrylic varnishes are less harmful for ones health and can be diluted in water in stead of turps?
+last question-when painting in oils – is it possible to clean the brushes in corn oil?-I`ve heard you can use safflower oil?