The rebate or rabbet width on frames and slips can often be a little narrow when framing paintings on canvas. The edges of the canvas can sometimes be patchy or untidy and have areas that need to be covered, and often the canvas will be unsquare which means even if the frame rebate is made large enough the canvas may not fit.
The linen slip frame above needed the rebate width increasing to accommodate the painting, so it could be fitted into an antique frame. This was done after the lengths were cut to size, but before the slip was joined together. I did this using a table saw, just a few passes and it is done.
