Mosaic Crochet is currently my favourite technique.
Patterns are created by working 2 rows in colour A, followed 2 rows in colour B, and so on. There is no need to switch colours within rows, so the pattern builds really quickly.
At first glance mosaic crochet charts may look complicated, but if you take one row at a time you should find they are much easier to follow than written instructions.
For this example we will be following the chart below, to create a simple coaster.
Before we begin, some important points to help you read the chart:
only right side (RS) rows are shown on the chart;
on wrong side (WS) rows 'work stitches as set', that is to say dc in all dcs and trs, 2 ch over all 2ch-sps;
read chart from right to left; bottom to top;
the first and last sts of each row indicate the colour to be used for the whole row, and the following WS row;
if there is no symbol in a square work 1 dc;
work a 1 ch turning chain between rows; turning chains do not count as sts;
the chart and written instructions are written in UK terms. For a US conversion chart see Hints & Tips page.
I used Drops Paris, 100% cotton yarn in colour 17 (colour A) and colour 41 (colour B); and a 4.5 mm hook, but any double knitting or aran weight yarn from your stash should do fine.
Finished coaster measures approx 15 x 15 cm
tr3d - working in front of ch-sp work 1 tr in missed st 3 rows down.
Row 1 (RS) Using Colour A, 22 ch, 1 dc in 2nd ch from hook, 1 dc in each ch to end. Turn. 21 sts
Row 2 (WS) 1 ch (does not count as st, here and throughout), dc across. Turn.
Row 3 Using Colour B, 1 ch, 2 dc, [2 ch, miss 1 st, 3 dc] to last 3 sts, 2 ch, miss 1 st, 2 dc. Turn.
Row 4 and all foll WS rows 1 ch, work sts as set. Turn.
Row 5 Using Colour A, 1 ch, 1 dc, [2 ch, miss 1 st, 1 tr3d, 2 ch, miss 1 st, 1 dc] to end. Turn.
Row 7 Using Colour B, 1 ch, [1 tr3d, 2 ch, miss 1 st, 1 tr3d, 1 dc] to end. Turn
Row 9 Using Colour A, 1 ch, 2 dc, [1 tr3d, 3 dc] to last 3 sts, 1 tr3d, 2 dc. Turn.
Row 10 1 ch, work sts as set. Turn.
Repeat rows 3 - 10 twice more.
Fasten off and secure all ends. Block if necessary.
This pattern is very easy to scale up to make a cushion, or even a blanket - just make sure your row 1 is a multiple of 4 + 1 sts.