Wikidata:Property proposal/shrinkage
shrinkage edit
Originally proposed at Wikidata:Property proposal/Natural science
| 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 (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)
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)
- Right. Thanks for the update. --Thibdx (talk) 20:11, 9 October 2018 (UTC)
Support, it looks sensible even if I am not knowledgeable in this field − Pintoch (talk) 22:49, 13 January 2019 (UTC)- Support.--Vulphere 15:20, 28 May 2019 (UTC)
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)
@Thibdx, Brya, Vulphere, Jura1: 
Done: shrinkage (P7079). − Pintoch (talk) 20:58, 23 July 2019 (UTC)