Definition
Dye lot
The batch a skein of yarn was dyed in, printed as a number or code on the label. Yarn from two different dye lots can differ visibly even when both are labelled the same colour, because dyebaths vary slightly between batches.
For a large project, buy all the yarn at once from one dye lot. If you must mix lots, alternate skeins every few rows so any difference reads as texture rather than as a band.
Tools that use this term
Yarn Calculator
Work out how much yarn a project needs from its finished size, your stitch gauge and the yarn weight you plan to use.
Blanket Yarn Calculator
Yarn estimates for bed and throw blankets by size, with the standard blanket dimensions already filled in.
Sweater Yarn Calculator
Yarn estimates for sweaters and cardigans by size, sleeve style and yarn weight, with a breakdown by piece.