# Throwing the Plate Step by Step

Unit: Shaping & Forming
Topic: Throwing a Flat Plate
URL: https://claybook.studio/learn/throwing-the-plate-step-by-step/

# From Lump to Flat Form

Now that you know the pitfalls, here is exactly how to throw a plate that survives.

## Clay Weight and Centering

Plates need more clay than you think for their height. A 25cm dinner plate might use 1.2–1.5kg of clay. Center it low and wide: a flat, stable disc, not a tall mound.

## Opening Wide

Open aggressively. Push outward more than downward. The floor of a plate should span almost the entire width of your clay mound, leaving only a small amount of wall at the edge.

Stop frequently and compress the floor. Then compress again. Then one more time. Use the flat pad of your finger, pressing in slow, firm circles from center to edge.

## The Walls

A plate's "walls" are actually just a raised rim: 2–4cm tall. Pull them with only 1–2 passes. The rim should be slightly thickened compared to the floor, not thin.

*   Pull the rim up and very slightly inward to give it structural integrity.
*   A rim that flares outward collapses during drying.

## Fighting the S-Crack

After every stage of opening, compress the floor thoroughly. The S-crack forms because the spiral pattern from opening leaves clay particles in opposing directions. Compression disrupts this pattern and realigns the particles.

This is the single most important step for a crack-free plate.

## Drying

Wire the plate off immediately and move it to a dry bat. Place it on a sheet of newspaper or foam, not a plaster bat, which can dry the base too fast. Cover the rim loosely with plastic for the first 12 hours.

## Warping Prevention Checklist
During first 24 hours:
* Keep airflow gentle and even
* Protect fast-drying rim
* Recheck flatness before full uncovering

Most plate failures happen in drying, not on the wheel.

## Keep Exploring

The S-crack problem is closely related to how [capillary action](https://en.wikipedia.org/wiki/Capillary_action) draws moisture unevenly through clay as it dries, creating internal stresses that exploit any weakness in particle alignment. Different clay bodies respond differently to these forces; [earthenware](https://en.wikipedia.org/wiki/Earthenware) clays, for example, tend to be more forgiving than [porcelain](https://en.wikipedia.org/wiki/Porcelain) when it comes to flat forms because of their coarser particle structure.

## Check your understanding

### Question 1: What is the single most important step to prevent S-cracks in a plate floor?

- [ ] A. Pulling the rim tall
- [x] B. Thorough floor compression after every opening step
- [ ] C. Using extra water
- [ ] D. Throwing the plate very quickly

Tip: Thorough compression of the floor after every stage of opening disrupts the spiral pattern and realigns clay particles.

### Question 2: Why should a plate rim be pulled slightly inward rather than straight up or outward?

- [ ] A. So food does not fall off
- [x] B. An inward rim holds its shape; an outward one collapses
- [ ] C. Inward rims look better with glaze
- [ ] D. It makes trimming the foot easier

Tip: A slightly inward rim has structural integrity to hold its shape during drying. A rim that flares outward collapses.

### Question 3: You've thrown a plate with a nicely compressed floor, but you're short on ware-board space. What is the best drying plan for the first 24 hours?

- [ ] A. Leave it uncovered on a plaster bat so it dries quickly
- [ ] B. Cover only the center with plastic so the rim can firm up
- [x] C. Move it to a dry bat, cover loosely, and keep airflow gentle
- [ ] D. Stand it on edge so both sides dry equally

Tip: Fast, uneven drying is what warps plates. Moving to a dry bat and covering the entire plate loosely slows and evens moisture loss, especially at the vulnerable rim.