The principle behind creating a picture is similar to that for changing colors in the C2C technique, with the difference that here we are operating with open and solid blocks. It’s a wonderful technique for making lace curtains, napkins and cushions.
We make foundation chain with a number of stitches divisible by three, plus five additional stitches which make up the edge and one of the sides of the block. We insert the crochet hook into the eighth chain stitch from the hook and crochet a double crochet stitch. We crochet two chain stitches and insert the hook into the third chain stitch, and crochet a double crochet stitch. We repeat this and now we have an open block.
If we have mastered making empty blocks, solid blocks may be described in the following manner – instead of skipping the second stitch of the previous row between the double crochet stitches, we make a double crochet stitch in each of them. In this way, we get four double crochet stitches next to each other which create a solid block.
The filet crochet technique allows one to design patterns on normal squared paper – if we accept that one square is one block, we may paint in solid blocks, thereby creating a unique project.