Blackboard
Reusable writing surface
Summary
A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, better known as chalk.
Originally created by Tarquin
5/27/2003, 9:34:47 AM
Modified
5/21/2026, 5:57:06 AM
Recent revisions
/* Issues with use */ Dropped [[WP:PRIMARY]] sources used for assertions about biomedical content. Please use [[WP:SECONDARY|secondary]] sources that are compliant with the stricter requirements of [[WP:MEDRS]].
/* Issues with use */ Adding back source and content on respiratory impact. Improving with more citation
/* Design */ consistent English spelling per article
Removed the reference that it causes asthma (that’s not what the source said) and removed the air pollution warning (not what the source wrote, IMHO a bad review, and it was only cited 4 times so I don’t consider it notable
/* Gallery */ per [[MOS:NOTUSA]]
remove redlink
Reverted 1 edit by [[Special:Contributions/8hz8d6hww8t|8hz8d6hww8t]] ([[User talk:8hz8d6hww8t|talk]]) to last revision by Nerd271
Fixed content
/* Issues with use */ Correction.
Cleaning up.
I added the "Health Risks" section
/* See also */ Already linked above.
/* Gallery */ Historical photo.
Removing link(s) [[Wikipedia:Articles for deletion/Chalkboard (typeface) (2nd nomination)]] closed as delete ([[WP:XFDC#4.0.16|XFDcloser]])
/* Issues with use */ fixed tone
added dist template
Reverting edit(s) by [[Special:Contributions/120.29.111.133|120.29.111.133]] ([[User_talk:120.29.111.133|talk]]) to rev. 1293918950 by Electromagneticunifiedfield: [[WP:VANDAL|Vandalism]] [[w:en:WP:RW|(RW 16.1)]]
/* Design */ milk
/* Design */ Sugar
/* Design */ sugar
