• 8 plywood planks
• 8 plastic planks
• Heat glue
• Plastic (solvent) glue
• PVA wood craft glue
• Glue stick (designed for use on paper)
• 8 plastic garbage bags
• 250mL measuring cup
• Water
Method
1. Make four wood crosses and four plastic crosses, as in figure 1, each joined at the centre with a 5mmx5mm area of the glue to be tested. Write on each cross which glue was used to make it.
Click here for larger version of figure 1.
2. Leave the crosses to dry for 48 hours without stressing the joins.
3. Set up equipment as per figure 2, with one cross.
2. Leave the crosses to dry for 48 hours without stressing the joins.
3. Set up equipment as per figure 2, with one cross.
Click here for larger version of figure 2.
4. Hang a plastic garbage bag, with one handle over each point marked in figure 2.
5. Pour 100mL of water into the plastic garbage bag.
6. Continue pouring water into the bag in 100mL increments until the glue bond breaks completely at the centre of the cross.
7. Record the amount of weight supported by the glue bond before breaking.
8. Repeat steps 1-7 for all glue and wood types.
9. Repeat steps 1-8 on at least two separate occasions.
4. Hang a plastic garbage bag, with one handle over each point marked in figure 2.
5. Pour 100mL of water into the plastic garbage bag.
6. Continue pouring water into the bag in 100mL increments until the glue bond breaks completely at the centre of the cross.
7. Record the amount of weight supported by the glue bond before breaking.
8. Repeat steps 1-7 for all glue and wood types.
9. Repeat steps 1-8 on at least two separate occasions.
Looking good Jemma- I look forward to the results!
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