None of the graduations are molded on the interior. They would be very difficult to mold in that way, and would interfere with the accuracy
Exterior molding also allows for a better grip on the item. However, it does differ by product. In addition to these raised graduations on the outer surface, a few of our products also incorporate printed graduations or alpha numeric indexing on the outer surface.
Normall, we define an autoclave cycle as 121°C at 15 psi (1bar) for 20 minutes.
As a general rule only, polypropylene, PTFE, PFA and PMP (TPX) products can be autoclaved. However, it is not recommended to subject volumetricwares (measuring cylinders, flasks etc) to temperatures above 80°C as they can affect the accuracy.
It is important to remove or loosen any caps before autoclaving bottles as the pressure difference can cause implosion.
A large proportion of our products are compliant to the following regulations:.
Meets the requirements stipulated in IS 10910 on ‘Specification for Polypropylene and its Copolymers for safe use in contact with foodstuff, pharmaceuticals, and drinking water’. Additives incorporated in the resin grades conform to the positive list of constituents as prescribed in IS 10909. The grade and the additives incorporated in them also comply with the FDA:CFR Title 21,177.1520, Olefin polymers.
As our bottles are not manufactured in a clean room environment we can not offer any cleanliness documentation. We do however suggest that you pre-rinse our general laboratory bottles with distilled water (or other suitable solution) prior to use.
Not at all as the direct heat of any kind can and will deform, melt and ultimately damage the Beaker.
This is especially important when using PTFE beakers. Although they can be used at temperature up to 260°C, PTFE is known to release fluorine gas at elevated temperatures.