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Terrazzo Coaster Tutorial Video


 

Thank you for purchasing our Terrazzo Coaster Kit! This kit comes with everything you need to create your very own Jesmonite terrazzo coasters! You will be able to make up to 4 coasters.

In your kit, you will have:

  •           2 x Reusable Coaster Moulds
  •           Jesmonite Liquid
  •           Jesmonite Base powder
  •           5 x colour pigment set
  •           Natural sealer
  •           Mixing sticks
  •           4 x Large Mixing Cups
  •           1 x Reusable Mixing Cup
  •           Sandpapers (80, 240, 400)
  •           Plastic sheet (to cast / sand)

Additional things you’ll need (not in the kit):

  •           Measuring scale
  •           Container of water for sanding
  •           Soft clean cloth for sealing

 

INSTRUCTIONS

1. Colour scheme and design

When making terrazzo, we start with the chips first, so plan your base colour ahead. Then, decide how many different coloured chips you want in your coaster – you can make up to four colours!

Optional: Download colour mixing chart here.

2. Make chips

For each colour, measure out
25g Powder
10g Liquid

Combine both powder and liquid well until you have a smooth and lump-free consistency. You have 10 minutes to mix and add pigments before it starts to set.

3. Add pigment

A little pigment goes a long way, so start small! We suggest squeezing out small drops onto a mixing stick, then adding to your Jesmonite bit by bit. The more pigment you use, the stronger the colour will be. Be careful not to add too much pigment, or the Jesmonite will not set properly.

4. Spread the mixture

Once you have your desired colour, pour your mixture onto the clear plastic sheet and spread it out thinly. Leave to set for 15 minutes. Once ready, the surface will be matte and the texture is brittle. Give it a test break to ensure a clean snap!

5. Crush it up!

Repeat steps 2 to 4 for the other coloured chips. Crush up all the chips with your hands. Set the chips aside while we make the base.

6. Make coaster

For each coaster, you will need to measure out
70g Powder
28g Liquid
35g Coloured Chips (in your desired colour combo)

Combine both powder and liquid like in step 2. Pour in your chips before it starts to set. Mix well.

7. Pour mixture into mould

Once combined, slowly pour mixture into the centre of your silicone mould and let it spread out. IMPORTANT: Give it a shake and tap the sides all around to release air pockets/ bubbles.

8. Release from mould

Leave to set for at least 30 minutes. As the Jesmonite mixture cures, it will be hot. Once it cools down, gently release it from the mould.

9. Sand, sand, sand!

Wet the coaster and sandpaper in a tub of water and start sanding your coaster with the coarse grit sandpapers (80-grit, then 240-grit) until the chips are revealed. End with the 400-grit sandpaper for a smooth finish. Once done, give the coaster a thorough wash and wipe dry.

10. Seal with sealer

To seal / waterproof your coasters, use a soft clean cloth to apply the sealer directly onto the coaster in circular motion. Leave to dry for at least 15 minutes before use.

 

Voila! You have made your own beautiful terrazzo coasters. We hope you have enjoyed this process and please tag @kittuco on Instagram to show us your creations!