How to Make a Good Paper Pattern

Using masking tape, fit and secure paper across hitch pins, bridge pins and agraffes (or equivalent upper termination). Make sure the paper is taut throughout and will not come loose during the rubbing/filing action.
ALWAYS begin rubbing/filing over the bridge pins first. This will help 'lock' the paper with less chance for it to shift. File/rub over the top of all points – check and re-check that no hitch pins, bridge pins, agraffes, etc. have been missed! Be as neat as possible because your new set of bass strings will be a direct reflection of the pattern you create.
It is a good practice to number your own rubbing (all hitch pins, bridge pins, agraffes, etc.). There has been occasions where some pianos actually have existing but unused hitch pins. The only way for this to be caught is for you to number your own paper pattern. If this is not indicated to us, the whole set will be manufactured incorrectly.
Include the following measurements for the first and last monochord, bichord, and wrapped trichord if any: core diameter, overall wound diameter, center of hitch pin to speaking bridge pin (measured directly in the piano), speaking length and hitch pin diameter (measured directly in the piano).
Send to manufacturer.

Fit one piece of paper large enough to cover the hitch pins and bridge pins as one piece. Do the same with another piece of paper for the agraffes (or equivalent upper termination).
Using masking tape, fasten each piece securely making sure it won't come loose during rubbing/filing.
File/rub over top all points (start with bridge pins for lower paper pattern section) – check and re-check that no hitch pins, bridge pins, agraffes, etc. have been missed! Be as neat as possible because your new set of bass strings will be a direct reflection of the patterns you create.
Number the hitch pins, speaking bridge pins, and agraffes (or equivalent upper termination). There has been occasions where some pianos actually have existing but unused hitch pins. The only way for this to be caught is for you to number your own paper pattern. If this is not indicated to us, the whole set will be manufactured incorrectly.
Include the following measurements for the first and last monochord, bichord, and wrapped trichord if any: core diameter, overall diameter, center of hitch pin to speaking bridge pin (measured directly in the piano), speaking length and hitch pin diameter (measured directly in the piano).
Send to manufacturer.