Wikidata:Property proposal/shrinkage

shrinkage

Originally proposed at Wikidata:Property proposal/Natural science

Done: shrinkage (P7079) (Talk and documentation)

Description	Reduction in the size of something, or the process of becoming smaller, typically when a material return to room temperature after heating.
Represents	Shrinkage (Q1170964)
Data type	Quantity
Template parameter	This proprety request is part of the project of creating an infobox for materials.
Domain	material (Q214609)
Allowed values	Any number. direction (P560) maybe used for material with an anisotropic shrinkage. determination method or standard (P459) or fabrication method (P2079) shall be specified. Two temperature (P2076) values are needed except if the process already define it.
Allowed units	percent (Q11229)
Example 1	nylon 66 (Q7071155) → 0,1 % with direction (P560) → parallelism (Q53875) and fabrication method (P2079) → injection molding (Q260606)
Example 2	nylon 66 (Q7071155) → 0,9 % with direction (P560) → normal (Q273176) and fabrication method (P2079) → injection molding (Q260606)
Example 3	Grivory GM-4H (Q57051271) → 0,8 % with fabrication method (P2079) → injection molding (Q260606)
Source	w:Shrinkage
Planned use	Creating an infobox for materials

Motivation

Shrinkage is one of the most important information considering the processing of a material. It is needed to define the exact dimensions of the mold. --Thibdx (talk) 21:06, 7 October 2018 (UTC)[reply]

Discussion

Comment from the samples/description, it seems that the proposal needs datatype quantity, not item. I updated that above. --- Jura 11:20, 9 October 2018 (UTC)[reply]
- Right. Thanks for the update. --Thibdx (talk) 20:11, 9 October 2018 (UTC)[reply]
Support, it looks sensible even if I am not knowledgeable in this field − Pintoch (talk) 22:49, 13 January 2019 (UTC)[reply]
Support.--Vulp here 15:20, 28 May 2019 (UTC)[reply]

Comment: this seems very detached from reality: often shrinkage and expansion are reversible. If a block of metal is heated it becomes bigger, if it cools it becomes smaller, and in that case shrinkage and expansion are linked. For natural materials it is different, these often shrink as they dry, but this is different from metals. - Brya (talk) 05:59, 23 June 2019 (UTC)[reply]

@Thibdx, Brya, Vulphere, Jura1: Done: shrinkage (P7079). − Pintoch (talk) 20:58, 23 July 2019 (UTC)[reply]