The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!
From the Wiki University
What evidence can you provide to prove your understanding of each of the following citeria?
Select opal for cutting as an opal doublet or triplet
|
|
Select suitable materials for cutting as a doublet or triplet based on market requirements and characteristics of the stone Completed |
Evidence:
|
Determine best play of colour and mark that side Completed |
Evidence:
|
Check for flaws with powerful light source and correct if necessary Completed |
Evidence:
|
Follow general OHS principles and safe operating procedures when using machinery for opal cutting Completed |
Evidence:
|
Flatten opal and base
|
|
Flatten opal on marked side until surface is free of potch and impurities and is completely down to the colour bar using appropriate equipment Completed |
Evidence:
|
Select backing materials and flatten Completed |
Evidence:
|
Lap opal and base until flat satin finish is obtained Completed |
Evidence:
|
Clean and dry opal and base Completed |
Evidence:
|
Cement components together
|
|
Blacken flattened surface with appropriate blacking agent Completed |
Evidence:
|
Mix adhesive in line with manufacturers’ instructions Completed |
Evidence:
|
Ensure stone is cemented with the best colour face down Completed |
Evidence:
|
Cement flattened surfaces together eliminating excess adhesive and air bubbles Completed |
Evidence:
|
Allow adhesive to harden following manufacturers’ instructions Completed |
Evidence:
|
Pre-form opal doublet
|
|
Grind stone to expose join between opal and backing Completed |
Evidence:
|
Grind stone to expose best colour Completed |
Evidence:
|
Grind to rough shape Completed |
Evidence:
|
Convert doublet to triplet
|
|
Manufacture a triplet working with a very thin opal layer Completed |
Evidence:
|
Lap the colour surface of the opal until a thin layer of opal remains on the backing Completed |
Evidence:
|
Clean and dry stone Completed |
Evidence:
|
Cement manufactured triplet top or preferred alternative to the opal surface, eliminating excess adhesive and air bubbles Completed |
Evidence:
|
After curing, grind the stone to expose both joins Completed |
Evidence:
|