BLOWN GLASS 2021-02-05T06:00:41+00:00

Blown Glass/Borosilicate Glass

John Moncrieff Ltd has specialized in offering blown glass solutions to our customers around the world since 1865.

Blown glass is created by the painstaking process of garnering the molten glass at the end of the hollow pipe and is then formed into a decorative molds or vessels by blowing, swinging, and rolling on the iron surface. The glass can be easily manipulated by using the preferred design of the molds and it also depends on the proficiency of the glassmith.

Blown Glass | Products

Blown Glass in simple terms, a blob of molten glass if blown into a mold of a given shape to create the finished article.

We can use various glass types to create a decorative piece in clear, or coloured glass, as well as in more specialist glass types designed for resisting heat or chemical attack.

Some available Finishes

Soda GlassSoda Glass
Soda Glass is the standard glass type used for making most decorative items. This can be in clear or in colours, most popular being Opal white, which is always available. As well as colours different effects are possible acid etching, cutting, crackle finish, transfer applied or bubbles through the glass to name a few.

Blown Glass Coloured

Blown Glass Coloured

Coloured glass is popular for decorative applications, we have a facility to offer various colours either using cased glass, by applying a spray resin, pate de verre, or pure colour

We always have clear and opal glass available, and periodically through the year, other colours as an when there is demand.

The facility to offer coloured spray resin is always available.

Blown Glass Borosilicate Glass

Blown Glass Borosilicate

Borosilicate Glass
Borosilicate Glass has excellent heat and chemical resisting properties, as such, it is principal use is for in scientific and engineering application, however it can be used for domestic use such as glass shades.

Some of benefits of Borosilicate

  • Ability to resist heat up to 350 Deg C
  • Articles can be blown with very thin wall
  • Excellent resistance against Acid and Alkali
  • Excellent for toughening/tempering
Blown Quartz Glass

Blown Glass Quartz

Quartz glass where clarity or the ability to resist great heat is used. Typically, quartz comes in flat sheet or tubular form. It can be manipulated into various forms but there are more limitations, than with other glass types.

Some of the benefits of quarts

  • Ability to resist heat up to 1200 Deg C
  • Articles can be blown with very thin wall
  • Excellent chemical and heat resistance

For environmental reason, we no longer offer production of the traditional 24% lead crystal glass.

Blown Opal Glass

Blown Glass Opal

We use opal glass, triplex opal, flashed opal glass for a wide range of lighting applications. Opal glass is an excellent diffuser of light. Our capacity can blow opal glass to a maximum of 600mm. It is also available in flat and tubular glass.

Not as widely used as borosilicate glass, but still an important type of glass. Aluminosilicate is able to withstand high temperatures and thermal shock, and is typically used in combustion tubes, gauge glasses for high-pressure steam boilers, and in halogen-tungsten lamps capable of operating at temperatures of 750°C.


Moncrieff offer both hand, semi automatic and fully automatic blowing facilities. This makes us perhaps the most versatile pressed glass company. Offering volumes from tens up to tens of thousands of units. All with the assurance of 150 years of experience.


At John Moncrieff Ltd we are equally happy dealing with large PLC as we are smaller concerns, all are treated with the same dedication to quality and customer service.


We invite you to send your enquiries. In the first instance please contact us with a drawing or sketch, outlining the usage conditions and an indication of production volumes.