The aim of this method is to determine the precise quantity of the mixture (liquid + powder) for each mold without waste . The steps involve measuring the mold with water and then converting the weight to the quantity of mixture ready for pouring.

Why this method?

• Consistent results from piece to piece.
• Savings in materials and time.
• Facilitating the preparation of several molds at once.

What do I need?

• Your mold to be poured.
• Zeroed digital scale (tare).
• Water for measurement only.
• A small notebook or mobile phone notes to record numbers.

Step-by-step method (measuring with water → calculating the mixture)

1. Place the mold on the scale and zero it.
2. Fill the mold with water up to the level you want the pour to reach.
3. Record the weight of the water and let's call it W (in grams).
4. Calculate the total weight of the mixture = 2 × W.
5. Calculate the weight of the liquid (water or acrylic liquid) = 25% of the total weight of the mixture .
6. Calculate the weight of the powder = weight of the total mixture − weight of the liquid .
7. Drain the water and dry the mold, then prepare the mixture with the same weights you calculated.

The principle is simple: A mold weighing W ( water) needs a ready-made mixture weighing 2W , of which one-quarter is liquid and three-quarters is powder .

Quick examples

• Example 1: The weight of water is 100 grams.
• Total mixture = 2 x 100 = 200g
• Liquid = 25% × 200 = 50 g
• Powder = 200 − 50 = 150 g
• Example 2: The weight of the water is 60 grams.
• Total mixture = 120g
• Liquid = 30 g
• Powder = 90g
• Example 3 (multiple cavities): A 4-cavity mold, each cavity containing 80g of water
• Weight of water for the set = 80 x 4 = 320 g
• Total mixture = 2 x 320 = 640 g
• Liquid = 160 g
• Powder = 480g

Reminder: The liquid can be water for an economical and quick result, or acrylic liquid for a smoother surface and higher durability—the calculation is the same in both cases.

A small safety margin (optional)

• Add an extra 3–5% for small quantities or complex shapes to compensate for losses during mixing and pouring.
• If a small amount of mixture remains: pour it into small sample molds for later use.

Important quality notes with Kraft Terrazzo Powder

• The working time is short; prepare, mix , and pour within ≤ 3 minutes .
• After pouring, a light tap on the edges of the mold helps to release the bubbles.
• Initial unwrap after approximately 30–40 minutes (carefully), and final dry within 72 hours before use or sealing.
• Work in an air-conditioned and dry place to obtain a smooth surface.

Common mistakes… avoid them

• Forgetting to zero the scale before measuring.
• Filling water to a height different from the required pouring height.
• Mix and then wait a long time before pouring (the mixture hardens quickly).
• Estimating the numbers by eye instead of scale—the discrepancy appears in the thickness and edges.

Quick summary

1. Weigh the water inside the mold → The number is W.
2. Total mixture = 2W .
3. Liquid = 1/4 of 2W , and powder = the rest .

With these steps you will get the exact amount of Kraft terrazzo powder for each mold, and create perfect pieces with minimal waste… every time.