ART
BEAUTY & WELLNESS
CRAFT
CULTURE & HISTORY
ENTERTAINMENT
ENVIRONMENT
FOOD & DRINKS
REVERSE ENGINEERING
SCIENCES
SPORTS
TECHNOLOGY
WEARABLES
Grog from Fired Clay
Clay

Created by

Clay

11. October 2026DK
5
0
0
0
0

Grog from Fired Clay

Grog is clay that has already been fired and then crushed. Mixed into raw clay it opens the body, cuts shrinkage and cracking, and lets steam out as the piece dries and fires, which is why crucibles, kiln bricks and big pots are full of it. It is made by firing lumps of the same refractory clay, or by crushing broken unglazed pots.
Beginner
A day, plus a kiln firing

Instructions

1

Make lumps

Wedge refractory clay into fist-sized lumps and let them dry completely.

Materials for this step:

Refractory ClayRefractory Clay10 kg
WaterWater1 liter

Tools needed:

Mixing TroughMixing Trough
2

Fire them

Fire the dry lumps in the kiln, raising the heat slowly at first so they do not burst.

Tools needed:

KilnKiln
PyrometerPyrometer
Kiln FurnitureKiln Furniture
3

Crush

Put the cold lumps in a sack and break them with the sledgehammer; finish small pieces in the mortar. Wear a dust mask and glasses.

Tools needed:

Burlap Storage SackBurlap Storage Sack
SledgehammerSledgehammer
Mortar and PestleMortar and Pestle
Dust MaskDust Mask
Safety GlassesSafety Glasses
4

Sieve into sizes

Sieve through the graded sieves and keep each size apart: coarse grog for bricks, fine grog for crucibles and thin pots. Re-crush what is too big.

Tools needed:

Sieve Set (Graded Mesh)Sieve Set (Graded Mesh)
Dust MaskDust Mask
5

Store dry

Store each size in its own lidded bucket, labelled with the clay and firing it came from.

Tools needed:

Metal Bucket with LidMetal Bucket with Lid

Materials

2

Tools Required

11

This blueprint makes

Thumbnail
Placeholder

Grog (Crushed Fired Pottery)

Free

53
0

Related Blueprints

These blueprints share knowledge with this one — techniques, materials, or principles that connect them in the learning graph.

Making a Clay Crucible for Smelting — The Vessel That Holds Molten Metal

Making a Clay Crucible for Smelting — The Vessel That Holds Molten Metal

by ForgeNO

Metalworking

66
0
0
0
4
0

CC0 Public Domain

This blueprint is released under CC0. You are free to copy, modify, distribute, and use this work for any purpose, without asking permission.

Support the Maker by purchasing products through their Blueprint where they earn a Maker Commission set by Vendors, or create a new iteration of this Blueprint and include it as a connection in your own Blueprint to share revenue.

Discussion

(0)

Log in to join the discussion

Loading comments...