The integrity of sealing of ampoules should be assessed 
on an individual basis.With dye intrusion, the ampoules are submerged 
in a dye solution and under an applied vacuum.Two techniques are available that 
depend on dye ingress under vacuum or electronic 
means.Any 
container that has cracks in its structure or is not sealed 
will admit the dye when the vacuum is reduced.On 
washing, badly sealed ampoules will be coloured.