The following table outlines common problems and causes when gluing Swarovski crystals, and offers advice on how to avoid them. Further details and more extensive descriptions can be found in the section marked with a
|PROBLEM|| CAUSE |
|The crystal has become discolored:|
The crystal is matt or yellowed.
The crystal seems black and dull compared to the surrounding crystals.
The crystal has been plated.
|The crystal has detached from the cavity without the foiling:|
The crystal has become discolored.
The crystal has detached with the mirror coating but without the platinum foiling or the glue.
7, 8, 9
|The crystal has detached from the cavity with the foiling:|
Glue is attached to the crystal.
No glue is attached to the crystal anymore.
10, 11, 12, 13, 14
15, 16, 17
|1||Glue residues have not been completely removed and have been smeared over the crystal.||Use a suitable dispenser to apply exactly the right amount of glue. Dispensers with a vacuum connection prevent the glue from dripping and reduce the amount of cleaning needed. |
|2||Too much glue was used.||Be sure to use the exact recommended dosage and to carefully remove any excess glue using e.g. acetone or isopropyl alcohol. |
|3||The axis of the cavity was already off-centre in the original model or the cavity was not drilled straight in the unfinished casting. ||Use a special bit when drilling the original model. This offers more precise control of the direction and depth of the drilling. |
|4||The jewelry was only plated after the crystals had been glued to it. ||It is recommended to complete the plating before gluing the crystals. |
|5||A gluing gap that has not been completely filled is causing corrosion. ||Make sure the exact dosage of glue is used. |
|6||Tensile stresses are reducing the adhesion of the mirror coating. Oxygen is penetrating between the stones and the mirroring and causing oxidization. ||Use glue that is more elastic and that does not shrink as much.|
|7||An incorrect glue system was used. ||Carry out tests with other glue systems. |
|8||Incorrect proportions of resin and hardener were used. ||Follow the glue manufacturer’s mixing instructions. |
|9||Cleaning agents have affected the glue and/or the protective coating.||Use less solvent or a different type of solvent. |
|10||Residues of polishing agent were not completely removed before plating. ||Double check the type of cleaning process used. |
|11||A varnished piece of jewelry has not been correctly pre-treated before gluing. ||Improve the adhesion of the glue, e.g. with low-pressure plasma treatment or flame treatment if necessary. |
|12||Too little glue was used. ||Make sure the exact dosage of glue is used. |
|13||The cavity has the wrong shape after plating. ||Re-work the original model to improve the cavity shape. |
|14||Electrolyte residues have not been completely removed. ||Double check the type of cleaning process used. |
|15||The specified processing time was exceeded and as a result the glue has already hardened. ||Reduce the processing time. |
|16||Too little glue was used. ||Make sure the exact dosage of glue is used. |
|17||General glue problems. ||Follow the manufacturer’s instructions. Check the conditions under which the glue is stored. Excess solvent could have corroded the glue and/or the foiling. |
|18||The jewelry piece was put under stress before the glue had hardened. ||Make sure the glue has hardened before e.g. transporting the jewelry. |