Vernier Tech Info Library TIL #2074

Question

Why is my picket fence blue and black instead of clear and black?

Answer

If you have a Picket Fence (order code PF) that has blue instead of clear sections, it will not work well. It turns out that the blue color is just from a protective coating that is put on the plastic Picket Fence to protect it from scratches while it is being shipped. Please remove the protective coating from both sides of the Picket Fence and it should be clear with black bars spaced every 5 cm.

Created by: dvernier on October 07 2009
Last updated by: jhopkins on October 07 2009