Tom Reichner wrote in post #18318372
Why masking tape instead of gaffer's tape? Wont the adhesive on masking tape leave an unwanted residue, and/or kind of melt when in heat, and then the unwanted adhesive residue on the lens attracts and holds dirt and fine debris? Sheesh! Seems like gaffer's tape would be so much better..
Generally I find it is Gaffer tape that leaves a sticky residue behind when it is either removed, or eventually gets old, tired, dried out and falls off. Masking tape on the other hand was developed by 3M as a special low tack adhesive tape for use in the automotive paint spraying industry. It's whole purpose was to be easily removable, without either leaving a residue or lifting the new paint, so that different areas could be easily masked off. Apparently the brand name that was used for this new product was Scotch, which was used as a derogatory term by some of 3M's customers in the area of the US the company was from. The clear tape that now also bears the Scotch branding was a later development, introduced for sealing clear plastic bags, but was made redundant by the advent of heat sealing systems, before it could actually get into production. The clear tape did though prove popular for many other applications. Clear Scotch tape has a stronger more permanent adhesive than the original paper based masking tape.
No I am not a walking encyclopedia on adhesive tape, I just happened to see this Youtube video (4' 35") about it a week or so ago. I did the above reply from memory, I wasn't going to watch it again, so there may be the odd slight error.