1. Producing Components from moulds
Two gauge casting

2. To Introduce fibrous Plasterwork
Producing Plaster Components
Aims:
To Introduce fibrous Plasterwork
Objectives:
To recognise and understand the processes used in two gauge casting

3. Producing Plaster Components
Introduction:
what do you know: What are firstings? 2. What types of reinforcement are used in two gauge casting? 3. How is the plaster applied to the mould? 4. List the processes involved in Two gauge casting? 5. What is size used for?

4. Producing Plaster Components
Introduction:
Two gauge casting is used to produce all manner of fibrous plaster items, the main qualities expected from two gauge casting is to produce a strong lightweight product.
Two gauge casting can be a long and complicated operation so preparation is everything.
Unlike one gauge care must be taken to prepare the reinforcement before any mixing takes place, so all laths and canvas must be cut to size before the casting process starts,

5. Prepare reinforcement materials
Producing Plaster Components
Two Gauge Casting
Prepare reinforcement materials
Prepare two amounts of water (firstings & seconds).
Add required amount of retarder to the seconds
Using a splash brush apply the firstings to the mould
Clean off the strike offs
Apply the seconds to the mould
Place the canvas in place and brush in with the seconds
Position the ropes and lath reinforcement
Place reinforcing wads on back of cast
Strike off the mould to complete

6. Producing Plaster Components
You now should have the knowledge to complete the following Introduction: What are firstings? 2. What types of reinforcement are used in two gauge casting? 3. How is the plaster applied to the mould? 4. List the processes involved in Two gauge casting? 5. What is size used for?