The normal range for the A1c test is between 4 percent and 6 percent for people without diabetes. The ideal range for people with diabetes is generally less than 7 percent.For diagnostic purposes, two separate A1c tests at 6.5 percent are positive for diabetes.he normal range for the A1c test is between 4 percent and 6 percent for people without diabetes. The ideal range for people with diabetes is generally less than 7 percent.
History: Discovered in 1855 by Sir Henry Bessemer. The Bessemer process was discovered through Sir Henryâs attempts to manufacture steel faster and more cheaply. Particularly for the purpose of manufacturing military weapons, which were at the time made with iron, which is considerably heavier than steel.
The Bessemer process produced the lightweight steel needed to build a suspension bridge.