1. Preparing and mixing materials in the workplace
Applying plaster materials to internal backgrounds

2. Understand the different types of products and how they should be mixed

3. Preparing and mixing materials in the workplace
Aims:
To introduce materials and how they should be mixed safely and correctly
Objectives:
Gain knowledge of materials and the different ways they should be mixed

4. Preparing and mixing materials in the workplace
Introduction
Can you answer the following?
List four types of lightweight undercoat plaster
State the quality of water required for mixing plaster
List the correct PPE required when mixing plaster
List two reasons why plaster would set quickly
What voltage is used on site when mixing plasters?

5. Preparing and mixing materials in the workplace
Introduction
When mixing materials, it should be done with Health and Safety in mind. It should be carried out in a well ventilated area and with the correct PPE being worn.
PPE stands for personal protective equipment and can include:
Protective gloves
Protective glasses
Clothing – jacket / trousers or boiler suits
Dust masks in relation to the area you are working in.
Barrier creams are also used to protect the skin during the working day

6. Preparing and mixing materials in the workplace
Preparation
Before the mixing of any materials can commence, the mixing area must be prepared.
Materials should be stored correctly to avoid contamination.
A supply of clean water should be readily available.
The surrounding areas should be protected to avoid unnecessary damage.

7. Preparing and mixing materials in the workplace
Mixing undercoats
When mixing in a plasterers bath or trough the correct amount of water should be poured into the bath and the material added to the water. Using a larry or shovel, pull the material through the water until the material reaches a consistent mix.

8. Preparing and mixing materials in the workplace
Types of finishing plaster
ThistlePro
Performance plasters. Designed for the professional
Thistle Essential
Everyday plasters

9. Preparing and mixing materials in the workplace
Mixing in a bucket or a tub
Put the correct amount of water into the container
Add the plaster to soak up all the water and allow to settle
Mix with a whisk or plunger
If required add more plaster to reach a satisfactory consistency
Be careful not to over mix the plaster as this will have an adverse effect on the set!

10. Preparing and mixing materials in the workplace
Universal One Coat plaster
For a variety of backgrounds
Suitable for application by hand or mechanical plastering machine

11. Preparing and mixing materials in the workplace
Mixing using a cement mixer
Start the mixer
Add water to the mixer
Add half the required amount of sand
Add half the required amount of cement/lime
Add the rest of the sand
Add the remaining cement/lime
Add additional water until the required consistency is reached

12. Preparing and mixing materials in the workplace
Conclusion
You should now have the knowledge to complete the following:
List four types of lightweight undercoat plaster
State the quality of water required for mixing plaster
List the correct PPE required when mixing plaster
List two reasons why plaster would set quickly
What voltage is used on site when mixing plasters?

13. THANK YOU