Editing Graduated cylinder (section)

== Scales and accuracy ==
For accuracy the volume on graduated cylinders is depicted on scales with 3 [[Significant figures|significant digits]]: 100mL cylinders have 1ml grading divisions while 10mL cylinders have 0.1 mL grading divisions.

Two classes of accuracy exist for graduated cylinders. Class A has double the accuracy of class B.<ref>{{Cite web|url=http://www.astm.org/Standards/E1272.htm|title=ASTM E1272 - 02(2019) Standard Specification for Laboratory Glass Graduated Cylinders}}</ref>
Cylinders can have single or double scales. Single scales allow to read the volume from top to bottom (filling volume) while double scale cylinders allow reading for filling and pouring (reverse scale).

Graduated cylinders are calibrated either “to contain” (indicated liquid volume inside the cylinder) and marked as "TC" or “to deliver” (indicated liquid volume poured out, accounting for liquid traces left in the cylinder) and marked “TD”.<ref>{{cite web|title=Graduated Cylinders Information|url=http://www.globalspec.com/learnmore/labware_scientific_instruments/labware_consumables/graduated_cylinders}}</ref> Formerly the tolerances for “to deliver” and “to contain” cylinders are distinct; however now  these are  the same. Also, the international symbols “IN” and “EX”  are more likely to be used instead of “TC” and “TD” respectively.<ref>{{Cite web|title = Graduated Cylinders|url = http://sizes.com/tools/graduated_cylinders.htm|website = sizes.com|access-date = 2016-02-23}}</ref>