PLEASE NOTE – An updated version of the Birka pattern was uploaded on 27th Feb 2014. If you downloaded patterns from this site before then you may have a copy of the previous version which had a major copy/paste error in the S/Z threading. My profound apologies to anyone who might have been wrestling with the erroneous pattern.
Images link to individual pdf versions of the patterns.
A file containing all the patterns can be found here: Tablet weaving patterns.pdf
N.B. A backwards turn is identical to a forwards turn of a tablet that has been flipped or twisted. More complex turning sequences are given both as a grid showing which cards need to turn in which direction and as a simplified sequence that uses twisted cards to replace the backwards turns.
Twisting a tablet works by turning it around the axis that runs across from the AD edge to the BC edge of the tablet, the warp threads swap from S to Z threading (or vice versa) and the A/D and B/C positions are swapped.