|Application Overview||Cavity Production||Checking Surface Tension and Pre-Treatment||Choice of Glue||Dosage and Setting||Post-Cleaning and Curing|
The glue can be precisely dispensed via a variety of dosage systems. Dispensers with a vacuum connection prevent the glue from dripping and reduce the amount of cleaning needed. The correct amount of glue will additionally protect the foiling from external influences. Attention must be paid to the application and quantity of the glue.
Irrespective of the shape of the gluing area, the glue should be applied as follows:
With a round gluing area, a dot of glue in the centre is sufficient. When the crystal is applied, the glue will be evenly distributed in the gluing gap. To glue a single spot, aim the dispensing needle just above the spot to be glued and lift it slowly upward to avoid any glue spreading out sideways.
With a square or rectangular gluing area, apply a cross of glue to ensure it is evenly spread into the corners.
When selecting the amount of glue to dispense, ensure that when setting and pressing down on the crystal, the glue spreads to the edges, thus offering additional protection for the foiling.
Half Hole Pendants
Two different types of adhesive can be used to affix the single Half Hole Pendant to the metal cap: UV glue and two-component epoxy resin glue.
If using UV glue, the crystal must be permeable to UV light. This applies for the following Half Hole Pendant colors and effects: Crystal, Crystal AB, and Amethyst. Best results in internal tests were achieved using the UV glue DELO-PHOTOBOND GB 368.
Please note that some crystal colors absorb UV light and are thus unsuitable for use with UV glues: Siam, Smoky Quartz, and Jet. In this case using epoxy resin glue is suggested. In internal tests, the best bond was achieved using CG 500 (A+B). As colors and effects not explicitly mentioned may provide variable results, in these cases it is recommended to perform application tests with UV glue or to choose the option of gluing with epoxy resin glue.
Once the glue has been dispensed the Swarovski products can be positioned. Pick up the crystals e.g. with a wax stick or tweezers, apply them to the gluing position and press down gently.
To prepare Chatons for the positioning process, a Chaton Sieve can be helpful. Take the black sieve (for size PP 0 - PP 1, art. 9030/003), grey sieve (for size PP 2 – PP 20, art. 9030/001) or the blue sieve (for size PP 21 – SS 34, art. 9030/002) according to the Chatons’ sizes. As the gray and the blue sieves provide two sides with different cavity sizes, make sure to choose the sieve type and side that perfectly matches the Chatons to be set. Place some crystals onto the sieve. By slightly shaking the tool and wiping over it with glove-covered fingers, the majority of Chatons automatically turn into the suitable position for gluing (table pointing upwards).
As a next step the Chatons can easily be picked up from the sieve using a tool like the wax stick, tweezers or a vacuum pick-up system. The use of a silicone wax stick is not recommended as this can impair the adhesion and the brilliance of the crystals. Apply the Chatons to the desired position and press down gently.
When working with cavities with large gluing gaps, the following tools assist in ensuring the optimum positioning:
To prevent the crystal from sinking or tipping during the hardening process, a small plasticine ball can be used to fix it in place.