IBM Supplies Worksheet

• Make sure to use the correct part numbers when you order new supplies. Using the wrong developer or toner, for example, can cause serious print quality problems and force a service call.
• Do not reuse waste toner or developer mix.
• The yields listed in Table 20 are approximations. They are not a warranty or guarantee of minimum life; they are provided only to assist in supplies planning. Analyze your actual usage figures to determine how much of each supply item to stock.
• Toner yield is affected by several factors, including print coverage, contrast setting, form type, and environment. Yields provided by the following formulas are approximate averages only. Toner yield is expressed in impressions per cartridge

  Yield in impressions per cartridge = (18 020 000 × A) ÷ (W × L × C)
  A = 1.25 for contrast setting 1
  A = 1.00 for contrast setting 4
  A = 0.85 for contrast setting 7
  
  W = Width of impression in inches
  L = Length of impression in inches
  C = Coverage on impression expressed as a percentage

  For example, on an 8.5 x 11-inch form with a contrast setting of 1 and a coverage of 4%:

  Yield = (18 020 000 × 1.25) ÷ (8.5 × 11 × 4) = 60 228 impressions

• The Fine Filter processing yield is based on 4 square inches of toner coverage per foot of forms with the printer control panel Contrast switch in the center (4) position. More dense applications, such as extensive bar codes, images, solid area fill, or printing with a higher Contrast setting can expect to achieve yields lower than those achieved with the average text page.
• Table 20 is a work sheet that lists IBM supplies and their part numbers. Make copies of this work sheet to use when you order supplies.