Assuming that several narrow boards have to be jointed together with hide-type glue, the boards should be arranged on the bench, choosing the best face uppermost, matching the grain and colour and, wherever possible, reversing the heart side so that any subsequent rounding is equalized without losing too much thickness (133:2). The boards are then marked as shown (133:1). The first board is held in the vice and the second board placed on it edge to edge and tested with a straight-edge across the total width. Any tilt either way on the top board must be corrected by replaning the edges; but if the boards have been squared on a jointer with incorrectly set fence, or on a shooting-board which is out of true, then reversing the face of
133 Jointing details each alternative board will correct the tilt (133:4). The top board should be swivelled slightly and should bind at both ends, while finger pressure applied simultaneously at both ends will disclose whether there is any tendency to rock, denoting that the edges are twisted. After establishing that the boards seat along their entire length with their faces in one line, then the other boards should be tried in like manner until the assembly is complete.
Gluing up rubbed joints Hide glue should be used, thin and hot, and after slightly warming the boards the first is gripped in the vice and the next tilted against it so that the glue-brush covers both edges at one stroke. The second board is then placed in position and rubbed backwards and forwards three or four times to squeeze out the surplus glue, keeping the hands low down and at either end, if possible, to avoid breaking the joint. Joints over about 3 ft (1.0 m) long should not be attempted single handed, and in any case long lengths should be cramped/ clamped and not rubbed. If the assembly is composed of several boards, they should be glued up in pairs wherever possible, and the glue allowed to harden before any further rubbing; while freshly jointed boards should not be laid flat but stood under their own weight against an inclined batten (133:3), leaving them for at least 24 hours before final surfacing.
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