Which are pre-lasting operations?
1. applying the toe puff, applying the stiffener, back-part pre-moulding, dressing the insoles, preparation of the lasts, conditioning the uppers, applying the insole on the last, forepart pre-mouldin
2. back-part pre-moulding, applying the stiffener, forepart pre-moulding, dressing the insoles, preparation of the lasts
3. applying the toe puff, applying the stiffener, back-part pre-moulding, dressing the insoles, preparation of the lasts, conditioning the uppers, applying the insole on the last, medial pre-moulding,
What is the main purpose of the conditioning operation?
1. during lasting, by keeping uppers under load, the relaxation phenomenon manifests, which leads to the increase of the remaining component of the deformations.
2. lasting process is more easily done: the stress on the materials that structure the shoe is reduced, and the resistance of the stitches increases.
3. When setting the temperature, the operator should target a lower value than the expected one.