Stretcher frames are not not glued at the corners but rather only fitted together. They gain their stability mainly through the stretching of a canvas around them and can be tensioned by means of wood wedges. The wedging out accomplished by these wedges is not for the purpose of correcting the failed stretching of a canvas (too loose, etc.) but rather as a way to compensate for changes in the canvas due to humidity. That is often not a problem until years have gone by. If you wedge out the frame too much it can cause cracks or fissures in the a picture because the primer and the paint, once dry, are not able to follow the movement of the canvas as it is wedged out.
Eight wedges are required for wedging out a frame. They must be inserted into the corner connections and carefully hammered into place. In the case of stretcher frames with unprimered canvases, the frame should be wedged out as early as possible after the primer has been applied because most natural fabrics constrict when moistened.
Wood wedges for stretcher frames
This is Modulor
We Love Material
Whether for design, architecture, model making, DIY, artwork or stationery: over 30,000 articles that make the heart beat faster. For professionals. And aspiring professionals.
Inspiring & Unique
Abreast of all developments in the world of materials: At Modulor there are always new, first-class products waiting to be discovered. In all shapes and colours – and in many instances tailor-made.
A Tradition of Creative Expertise
Questions about materials? We provide personalized and competent advice. With over 25 years of experience our enthusiasm for materials continues unabated: +49 (0)30 690 360
PayPal, credit cards, direct debit – at Modulor paying is very simple. Pay after delivery? No problem: just select „Invoice“ as payment method.
We deliver with our logistics partner quickly and securely – upon inquiry, same day delivery is even available within the Berlin city limits.
Standard shipping is free within Germany for orders over €80.
A Berlin Original
All the products and even more ideas can be experienced in person at our Berlin-Kreuzberg store. Over two floors and more than 3,000 m².
Sign Up and Get 5€ Off Your Next Purchase
Exclusive vouchers and sale
All the news about Modulor
Welcome to Modulor
WITH or WITHOUT VAT?
As a business customer, see net prices - or as an individual customer, see all prices including sales tax.
Business customer Price with sales tax
Private customer with VAT
You can change your choice at the top of the page at any time in the future.