The RH Trecker first needs to be threaded with the chosen book binding thread, bead threading cable/wire or other thread determined as appropriate. This is done by inserting the end of the thread through one of the 10 small holes below the adjustment nuts on the inner-side of the Trecker, the side facing into the centre of the painting. The end of the thread is then secured with a few knots to the top side of the tensioner on the tension screw. A silver 'jump ring' is fitted over the top of the the tensioner, first raise the loop around the tenioner on the back side, this loop goes through the jump ring and the jump ring is pushed down to fit on the tenioner. The purpose of this is to stop the thread being cut by the tenioner metal thread when it is being used. When all 10 tensioners have threads attached and the threads then pass down the face and under the 8 mm diameter stainless steel bar that holds them against the surface of the work and extend to be attached to a short piece of cotton webbing that in turn is adhered with BEVA or Comand tape to the surface of the verso of the work on the far side of the tear.
The RH Trecker is attached to the stretcher bar of the painting on the verso, securing into position so that the 2 clamping screws are on the out side of the work. a piece of wood of mount board need go be positioned under the clamping screws so the the screws do not act directly on the tacking margin. With the pair of Trecker in position and the tensioning threads attached to the verso of the work, using the 4 mm hexagonal wrench supplied, and already used to tighten the clamping screws, the tensioning nuts can be screwed to firstly take up the slack in the threads, and then draw the opposite edges of the tear together to ready it for beginning the thread by thread technique.
Please Note: RH equipment is intended for use only by professional conservators. Use by inexperienced operators may result in damage to objects being treated.