Use a white grease to label color filters (gel) for easy identification.
Chinagraph/Grease Pencil Pack - Notebook & Pens - ShavenRaspberry
White Grease Pencil, Scenic Supplies for Stage & Theater
The Best Crayons in 2020
Theatrical Makeup
Grease Design Ideas
The Best Metallic and Glitter Pens
The Best Blackout Curtains
Marking directly on film or tape.
Editor's Grease Pencil
4,142 Theatre Stage Sketch Images, Stock Photos, 3D objects, & Vectors
English and Drama blog: Letters
39,996 Thick Line Drawing Images, Stock Photos, 3D objects
China Marker Grease Pencil - Peel-Off Sharpie WHITE 2 Pack : Office Products
Grease Pencil White