Miscellaneous
3D Printer Markers, Gradient Rainbow 3D Printer Filament, Silk PLA 1.75mm Sublimation Universe Forest Candy Macaron Series Filaments for 3D Printing(Candy Silk- 500g)
Printing Temperature:180-220°C Print speed:30~60mm/s Empty speed:40~80mm/s Heated Bed: Not required but can be used (up to 60 °C) The color of the filament looks like the rainbow.
https://www.bizrate.co.uk/miscellaneous/3d-printer-markers-gradient-rainbow-oid40390922326.html