Hollowing - Revision history

DT Online at 08:55, 5 July 2017

2017-07-05T08:55:04Z

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	Once a satisfactory hollowed form has been achieved, it can be trued ~~and~~ the metal '''[[Crystalline_Structures#Work_Hardening\|Work Hardened]]''' by a process known as [https://en.wikipedia.org/wiki/Planishing '''Planishing''']. It is important that the metal is thoroughly cleaned before '''[[Planishing]]''' ''(e.g. by '''[[Pickling]]''' and/or scouring)'' to avoid any grit, oxides or other contaminants being hammered into the surface.		Once a satisfactory hollowed form has been achieved, it can be trued, the metal '''[[Crystalline_Structures#Work_Hardening\|Work Hardened]]''' and polished, by a process known as [https://en.wikipedia.org/wiki/Planishing '''Planishing''']. It is important that the metal is thoroughly cleaned before '''[[Planishing]]''' ''(e.g. by '''[[Pickling]]''' and/or scouring)'' to avoid any grit, oxides or other contaminants being hammered into the surface.

DT Online at 08:42, 5 July 2017

2017-07-05T08:42:19Z

← Older revision	Revision as of 08:42, 5 July 2017
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		Once a satisfactory hollowed form has been achieved, it can be trued and the metal '''[[Crystalline_Structures#Work_Hardening\|Work Hardened]]''' by a process known as [https://en.wikipedia.org/wiki/Planishing '''Planishing''']. It is important that the metal is thoroughly cleaned before '''[[Planishing]]''' ''(e.g. by '''[[Pickling]]''' and/or scouring)'' to avoid any grit, oxides or other contaminants being hammered into the surface.

DT Online at 09:53, 22 May 2017

2017-05-22T09:53:56Z

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	[[File:UsingStakesSandbag.png\|right\|300px]]		[[File:UsingStakesSandbag.png\|right\|300px]]
	=====Hollowing with a Sandbag and Planishing ~~Strake~~=====		=====Hollowing with a Sandbag and Planishing Stake=====

	Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[~~:Category:Stakes\|~~Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the '''[[:Category:Stakes\|Stake]]''' has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.		Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the '''[[:Category:Stakes\|Stake]]''' has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.


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	=====Truing the Hollowed Form=====		=====Truing the Hollowed Form=====

	Following an initial '''Hollowing''' using either '''[[Sandbag]]''' or '''[[Hollowing Block]]''', the second operation is to true the roughed out form by beating it over a '''[[~~Planishing\|~~Planishing Stake]]''' using the flat-face of a '''[[Rawhide Mallet]]'''.		Following an initial '''Hollowing''' using either '''[[Sandbag]]''' or '''[[Hollowing Block]]''', the second operation is to true the roughed out form by beating it over a '''[[Planishing Stake]]''' using the flat-face of a '''[[Rawhide Mallet]]'''.

DT Online at 12:11, 11 May 2017

2017-05-11T12:11:19Z

← Older revision		Revision as of 12:11, 11 May 2017
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	=====Hollowing with a Sandbag and Planishing Strake=====		=====Hollowing with a Sandbag and Planishing Strake=====

	Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[~~Planishing~~\|Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the '''[[:Category:Stakes\|Stake]]''' has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.		Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[:Category:Stakes\|Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the '''[[:Category:Stakes\|Stake]]''' has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.

DT Online at 11:59, 11 May 2017

2017-05-11T11:59:54Z

← Older revision		Revision as of 11:59, 11 May 2017
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	=====Hollowing with a Sandbag and Planishing Strake=====		=====Hollowing with a Sandbag and Planishing Strake=====

	Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[Planishing\|Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the ~~stake~~ has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.		Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[Planishing\|Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the '''[[:Category:Stakes\|Stake]]''' has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.


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	As with the initial '''Hollowing''', the mallet strikes the ~~stake~~ in the same place each time as the metal is rotated and passed under it to cause strikes to be in decreasing circles from outer rim to centre.		As with the initial '''Hollowing''', the mallet strikes the '''[[:Category:Stakes\|Stake]]''' in the same place each time as the metal is rotated and passed under it to cause strikes to be in decreasing circles from outer rim to centre.

DT Online at 17:42, 2 May 2017

2017-05-02T17:42:48Z

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			[[Category:Skills and Processes]]
	[[Category:Beaten Metalwork]]		[[Category:Beaten Metalwork]]

DT Online: Created article

2017-04-20T11:12:45Z

Created article

New page

[[File:CopperBowl2.png|right|400px|Copper Bowl|link=https://pixabay.com/en/dish-bowl-copper-shiny-metal-366151/]]
__TOC__

=====Description=====

'''Hollowing''', when used to describe a process in Beaten Metalwork ''(e.g. [https://en.wikipedia.org/wiki/Coppersmith '''Coppersmithing'''] or [https://en.wikipedia.org/wiki/Silversmith '''Silversmithing'''])'', is the initial operation used to transform a flat sheet of '''[[Heat_Treatment#Annealing|Annealed]]''' metal into a shallow bowl form.

[[File:UsingBossingMallet.png|right|300px]]
=====Hollowing with a Sandbag and Bossing Mallet=====

The established technique of '''Hollowing''' a simple bowl is first to create a hollow impression into a '''[[Sandbag]]''' using a '''[[Bossing Mallet]]'''. The flat disc of metal is then held at an angle to the hollow and beaten into it using the larger diameter end of a '''[[Bossing Mallet]]'''.

The mallet is consistently beaten down on to the same place on the '''[[Sandbag]]''' as the metal is turned under it. As the process continues, the metal is passed further under the mallet such that it is struck in series of decreasing circles starting at the outside and working towards the centre.

[[File:UsingStakesSandbag.png|right|300px]]
=====Hollowing with a Sandbag and Planishing Strake=====

Some [https://en.wikipedia.org/wiki/Silversmith '''Silversmiths'''] prefer to use a '''[[Planishing|Planishing Stake]]''' instead of a '''[[Bossing Mallet]]'''. Although not as comfortable to hold as mallet, the stake has good weight and imparts a curve on the metal similar to the curve of the stake over which the hollowed bowl will be trued and finished by '''[[Planishing]]'''.

The work should rotate and the strikes progress from outside to centre as when using a '''[[Bossing Mallet]]'''

[[File:UsingHollowingBlock.png|right|400px]]
=====Using a Hollowing Block=====

An alternative to supporting the work on a hollowed '''[[Sandbag]]''' is to use a block of wood which has been suitably hollowed at one end - known as a '''[[Hollowing Block]]'''. This technique is particularly useful for smaller diameter or deeper forms.

Dependant on the size of product being made, either end of the '''[[Bossing Mallet]]''' may be used. Alternatively, a '''[[Silversmith's Hammer|Blocking Hammer]]''' can be used to provide a firmer strike.

The work should rotate and the strikes progress from outside to centre as with other '''Hollowing''' techniques.

[[File:HollowingRawhideMallet.png |right|350px]]
=====Truing the Hollowed Form=====

Following an initial '''Hollowing''' using either '''[[Sandbag]]''' or '''[[Hollowing Block]]''', the second operation is to true the roughed out form by beating it over a '''[[Planishing|Planishing Stake]]''' using the flat-face of a '''[[Rawhide Mallet]]'''.

As with the initial '''Hollowing''', the mallet strikes the stake in the same place each time as the metal is rotated and passed under it to cause strikes to be in decreasing circles from outer rim to centre.

<div style="clear: both;"></div>
{{Sandbags, Hollowing and Doming Blocks}}

[[Category:Beaten Metalwork]]