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Bed surface

The G1 print bed uses a 6 mm tempered glass plate as the standard print surface. The glass sits on the heated aluminum bed plate. Different materials require different adhesion strategies on this surface.


ParameterValue
MaterialTempered glass
Thickness6 mm
Size120 × 120 cm
  • Flat, rigid, dimensionally stable
  • Easy to clean
  • Gives a smooth bottom face on prints
  • PETG bonds extremely strongly to glass without a release agent — can damage the glass when the part is removed
  • Requires adhesion spray for most materials to prevent warping

  • Bed temperature: from the material profile — PLA profiles ship 50–70°C. Lower is often better against warping
  • Apply Dimafix, MagiGoo, or a light coat of glue stick
  • PLA sticks “like rock” to glass at 40°C with proper spray; when the bed cools below 30°C, parts often release on their own
  • If first layers are milky or lifting: the bed is too hot for that grade — come down in steps
  • Always put a layer down — without one, PETG bonds so strongly it can crack the glass when the part is removed. DimaFix protects the glass and increases adhesion; Rain-X protects the glass only
  • Bed temperature: the PETG profiles ship 80°C
  • Apply spray in a thin, even coat with a paper towel; re-apply when the surface becomes too oily or loses tackiness
  • Large flat PETG parts: add 2+ lines of inner + outer brim in the slicer

The G1’s bed is tempered glass. That is what the machine is specified on, and what everything else in this wiki assumes.

The glass itself is not special. If a job needs a different one — another thickness, a cut-out, or simply a spare — it can be made independently: any local glazier will cut it, and it costs little. See Replacing the glass.

Other surfaces can be used: a plate made in glass fibre, or printing straight onto wood. They are not surfaces Ginger Additive supplies, supports or has characterised — adhesion and flatness are yours to work out.

A broken plate is not a spare part you have to order from us. It is ordinary tempered glass, and any local glazier can cut one — cheaply, and usually faster than a shipment would arrive.

ParameterValue
MaterialTempered glass
Size120 × 120 cm
Thickness6 mm

Give the glazier the exact size: it has to cover the heating mat, not the print area, and tempered glass cannot be cut after tempering — so it must be cut to size before it is toughened.


Clean glass bed overview before surface preparation begins

  1. Move the extruder to the back of the machine using the display Move menu — this frees up space to work on the glass

KlipperScreen Move screen — use this to position the extruder out of the way before cleaning

  1. Scrape off print residue with a plastic spatula (yellow squeegee) — remove any leftover material from the previous print

Scraping the glass bed with a yellow squeegee to remove print residue

  1. Apply glass cleaner (spray or liquid) over the surface

  2. Wipe clean with a cloth or paper towel until the glass is dry and residue-free

Applying glass cleaner to the bed surface

  1. Apply the correct adhesion product for the material you are printing:
    • For PETG: protect the glass — DimaFix, which also holds the part, or RainX, which only protects
    • For PLA / rPLA: apply hairspray (lacca spray) as an adhesion promoter

Applying RainX to the glass bed for PETG printing

Applying hairspray to the glass bed for PLA printing

  1. Let the product dry before heating the bed — do not spray onto a hot bed

  2. The bed is now ready to print

Glass bed fully prepared and ready for printing


  • Clean it with water or an ordinary glass cleaner — not alcohol
  • Old spray build-up comes off with warm water and a sponge