TECHNICAL DATA
#8 Black Pitch Bar
PB0080

#8 BLACK PITCH is a semi-hard temporary cement used for a variety of blocking applications. #8 BLACK PITCH is commonly used for blocking together a series of lenses or work pieces that need to be edged or profiled. Other applications include Blanchard wheel work, spot blocking, surface protection, and a variety of uses where semi-hard, high tack materials are desired.

Application

Depending on application, #8 BLACK PITCH can be applied in two basic methods:

  1. Pre-melt #8 BLACK PITCH in a controlled heating vessel, and apply or pour molten pitch to blocking plate or lap, and then mount the workpiece.
  2. Pre-heat the blocking plate or lap and work piece, and wipe the pitch across the heated tool and mount the workpiece.

#8 BLACK PITCH can be removed from the parts by using UNICLEAR or UNICLEAR II. For best results, please consult with UPI technical staff to recommend optimal processing conditions.

Benefits
  • Unaffected by water and coolant
  • High dielectric constant
  • Lack of porosity
  • Works well with diamond tooling
Physical Characteristics
Test #8 Black Pitch Bar
Appearance Solid Black
Softening Point (°C) 52 ± 4
Melting Point (°C) 68 ± 4
Ball Penetration Test (70F, 500 g weight, 1hr) (in) 0.0020 ± 0.0010
Availability
  • 2 Bar(s)
  • 1 Tray(s)
Information included herein was obtained from sources which UNIVERSAL PHOTONICS, INC. and its subsidiaries believes are reliable and accurate as of the date hereof. However, no representations or warranties, either expressed or implied, of merchantability, fitness for a particular purpose or of any other nature are made herein as to the information provided or the product to which the information refers. The health and safety precautions contained herein may not be adequate for all individuals and/or situations. It is the user's obligation to evaluate and use this product safely and to comply with all applicable laws and regulations. Given the variety of factors that can affect the use and application of a product, some of which are uniquely within the user's knowledge and control, it is essential that the user evaluate the product to determine whether it is fit for a particular purpose and suitable for user's method of use or application. We assume no legal liability for any injury, accident, loss, or damage through the use of this product. ver.12.19.2022a/TD