thread+catalogs

As explained with the number systems it is hard to compare different types of threads. To overcome this problems two ladies collected and measured the width of many threads suitable for lacemaking. The results are available in books: > an online extract_ describes how to match thread width and pattern size > some online content: [|in proper English], [|with images]
 * Threads for Lace - Brenda Paternoster
 * Thread and Pricking: a Partnership - [|Martina Wolter-Kampmann]

Calculated conversion
Both ladies introduced their own definitions to express the width. By their mathematical definitions the values of BP and MWK could be converted as follows: dD is a German shorthand for "average diameter" This theory is shown below with the red line. The dots show the values found in practice. It appears that MWK winds tighter than BP. The blue line compensates for this. The straight purple lines shows that 29 dD measured by MWK comes between 20-26 w/cm by BP. The straight green lines shows that 40 w/cm measured by BP comes between 15-19 dD by MWK.
 * 1000 / wraps per cm || = dD ||
 * 1000 / dD || = wraps per cm ||