The advice I have already given is based upon this:-
I have in excess of 55 years collecting, buying, selling, making, restoring keris.
Apart from what I have taught myself, I have learnt Javanese methods of restoration from several mranggis, including two who were in my employ for many years. One of these men was the son, and grandson of mranggis.
I have learnt other aspects of keris manufacture and restoration from several blade makers.
I have also made a very large number of damascus and carbon steel blades and was a member of the Australian Knifemakers Guild for a number of years.
The way in which heat can damage a blade is by heating it to a point where the temper will be drawn. The area of the blade that is heated to remove a hilt is almost never heat treated in a keris blade, thus there is no temper to draw.
The heat generated by a candle or a small kerosene lamp is not sufficient to damage a blade in any way at all.It is not possible to raise the temperature of a blade to the point where temper can be drawn, by use of a candle or kerosene lamp.
Hilt to blade can be secured by rust, cloth, hair, damar, jabung, or shellac, or in some cases a modern glue or epoxy resin.
Boiling water may soften jabung if the wax content is sufficiently high, but it will have no effect on rust, damar, shellac or epoxy resin.
Boiling water will cause cloth to expand at approximately the same rate that it causes wood to expand, because of this there is a risk of splitting the wood in the hilt.
That risk of splitting applies in all cases as soon as the hilt enters the boiling water.
If the hilt does not split, depending upon the finish that has been applied to the hilt, it will possibly need refinishing.
In my most humble opinion the practice here related of immersing a complete hilt into boiling water in order to remove it from a blade is most certainly barbaric and verges upon idiocy.
I accept what has been related , that this is common practice in Singapore and Malaysia, and this being the case, it tells me all I need to know about the professionalism and skill of the people who engage in this practice.
Regrettably Big G I must disagree with you that this is a matter of perspective.
It is not.
It is a matter of professional standards.
The dominant professional standard to be applied in the restoration of any keris is to proceed in a way that will cause no damage to the keris. No damage to blade. No damage to hilt. No damage to mendak. No damage to any part of the keris.
The profession involved is the profession of the m'ranggi, and this has had a long and continuous history in Jawa.
I would most sincerely suggest that the people who currently subscribe to the boiling water philosophy would be doing themselves and their clients a very great service by seeking out some instruction from true professionals in this field of keris restoration.
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