I use XL Stretched Block Canvases by Gerstaecker, a superior brand that have an extra deep profile of 5cm edges.
They are made with 380gsm, 100% cotton. The canvas is stapled to the back of the frame which is made from high quality wood from sustainable forests and is in one single piece, in contrast to other brands which consist of 2 pieces glued together. This provides complete solidity and optimal stability.
The canvases can easily be hung without further framing due to the stability of the thick stretchers.
Whenever a bespoke sized canvas is required, I use a professional canvas stretching service and a highly trained craftsman makes each canvas to order using quality materials and heavyweight 100% cotton canvas.
I use acrylic, water based paints and a hand made impasto that I create using a variety of ingredients and bonding agents to form a thick textured paste.
Each canvas is coated with a special UV varnish that protects the artwork from direct sunlight and moisture.