GALLERY STRETCHER-240 Manual de instruções - Página 17

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and is not likely to return to it's original condition. Our belief is that stretching light

giclees at 15-20 psi is more than sufficient and that heavy canvas should be no more than

30-40 psi.

Stretching Large Art

Artwork larger than 30" x 30" should probably be made with a cross-brace; this will

reduce the amount of deflection of the stretcher bar during a stretch. There is a "keystone

effect" that occurs when stretching large pieces when the plates are placed close to the

outside rails. The rails provide strength for the stretcher frame, placing the stretcher

plates away from the center causes the stretching force to be applied more to the outside

and not in the middle were it is needed. The ideal placement of the stretcher plates is half

the distance between the center and the outside rail, do this for both sides.

Tips & Tricks

Large artwork will not typically rise very much during a stretch due to the weight of the

stretcher bar. The heavier the stretcher bar the less likely it is to rise. Most operators

would tend to increase the stretching pressure above 50 psi; this will cause the canvas to

slip out of the grip of the clamp. Instead, the operator should lift the far end of the

artwork until it is approximately 3-4" above the work surface, this will permit the canvas

to stretch over the edge of the stretcher bar with less resistance. Placing a soft foam roller

or pad of cardboard under very large artwork will produce the desired effect.

Here is a link to our support page where you will find several videos that may help with

the set-up, making folds, operations and general answers.

http://www.youtube.com/user/dweaverframe?feature=mhee