Purlbed

Rib › Rib textures and blocks

Plated transfer motifs (reversible two-colour image)

Flat, crisp two-colour picture (geometric optical illusions, cubes, Fair-Isle/jacquard-like motifs, single figurative motif), no floats, back side shows same image in inverted colours. Moss-stitch areas read as a speckled third tone for shading. Bed map = image.

Machine types that can knit it

Demo swatch

Drawn for: Double-bed hand flat (V-bed)
Approximate preview worked out from the bed chart, not a photo.
Bed chart
15101520253035→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←Front bedBack bed1 square = 1 stitch × 1 row · read from the bottom · Hand flat (V-bed), 36 needles, half pitch
Needle notation, first steps
1. Rows 1–7: knit 7 rowsFront bed onlycarriage →backfront2. Transfer 2 stitches to theback bedbackfront3. Row 8: knit 1 rowBed-selected motif (front 34 /back 2)← carriagebackfront4. Transfer 2 stitches to theback bedbackfrontShowing needles L12–R12 of 36; repeat across the working area.

Steps

  1. Swatch: stitches and rows per 10 cm.
  2. Rescale motif: cell height ≠ cell width; drawn on squared paper the chart looks elongated but knits true.
  3. Chart grey (front)/white (back).
  4. Knit row by row, transferring per chart.
  5. Steam flat.

The full card

What it looks like
Flat, crisp two-colour picture (geometric optical illusions, cubes, Fair-Isle/jacquard-like motifs, single figurative motif), no floats, back side shows same image in inverted colours. Moss-stitch areas read as a speckled third tone for shading.
How it behaves
flat (steamed flat); slight relief at boundaries.
How it works
Bed map = image. Plating places colour A on knit faces and B on purl faces, so front-bed cells show A and back-bed cells show B on the face. Transfers at each colour boundary, down to 1-stitch detail.
Machines
Double bed + plating feeder (domestic plating feeder or V-bed carrier). Industrial independent carriers allow "inverse plating" with 3+ colours. Punch-card patterns can be reused as bed maps (but transfers are manual).
Parameters
motif size, colour pair, moss-fill zones, stitch/row gauge (swatch 10 cm).
Steps
1) Swatch: stitches and rows per 10 cm. 2) Rescale motif: cell height ≠ cell width; drawn on squared paper the chart looks elongated but knits true. 3) Chart grey (front)/white (back). 4) Knit row by row, transferring per chart. 5) Steam flat.
Charting
1 cell = 1 st × 1 row; grey/white plus checkered moss areas.
Limits and common problems
Every boundary change is a hand transfer → slow for large motifs. Hairy yarns blur the image.
Combines with
block-transfer-checker.
Pieces and assembly
Reversible → good for scarves, flaps, folded parts where both faces show.

Written in our own words from machine manuals, knitting references and swatching. Knit a test swatch before a whole piece.

Related techniques