Lipstick Manufacture
Lipsticks are commonly made in small batches. A ordinary
manufacturing method might be as follows:
The oil is heated in the processing tank to a hundred
seventy five - 185ºF (80 - 85ºC). The waxes are melted one after the other in a
hemispherical jacketed vessel (regularly referred to as a "kettle"),
that's normally ready with an anchor stirrer/scraper. Some of the oil may be
added to the kettle to aid the process.
The waxy phase is delivered to the oily section. Different
varieties of mixers/dispersers are used to combine the two levels.
A "pigment grind" is prepared through dispersing
the powdered pigment in part of the oil using a 3 roll mill, ball mill or
similar conventional mill. More and more pre-synchronized pigments are used.
These do not require grinding as such, however a few degree of shearing may be
required to interrupt down the clumped debris.
Ready-to-use liquid pigment dispersions also are widely used
no matter their better price. These may be brought without delay to oils and
waxes with out pre-remedy.
The crushed pigment is delivered to the oil/wax section and
combined until a homogeneous product is received. This may additionally require
going thru a colloid mill or comparable.
The combination is slightly cooled earlier than including
flavors, preservatives and different components.
The completed product is held at a decrease temperature
earlier than being forged into molds and cooled to solidify.
The sticks can be "flamed" to produce a sleek
floor finish.
The trouble
The manner is challenge to a number of troubles:
Long processing times are required to soften the waxes;
Solid chunks may also want to be broken up earlier than they can be delivered
to the kettle.
Ground pigments and pre-dispersions are hard to disperse
inside the oil/wax medium due to the large difference in viscosity.
The final product may additionally require passage via a
grinder to obtain the specified consistency and homogeneity.
The solution
Product high-quality and consistency can be improved and processing times may be extensively reduced by means of using a Silverson excessive shear batch mixer to prepare the premix. It also can reduce and in some cases get rid of the want for traditional grinding. The rotor/stator mixer works as follows:
Level 1
Oils and waxes are weighed into the pot and heated. The
mixer starts offevolved while the product is partly liquefied. The
excessive-velocity rotation of the rotor creates effective suction, drawing
debris of wax and other components into the operating head.
Level 1
2d step
Step 3
Advantages
Very brief mixing times.
Improved consistency and texture of the product.
Some manufacturing steps can be eliminated.
The reduced particle size and greater uniform premix
produced can considerably reduce the time required for the milling step.
Silverson manufactures a range of backside access and batch
mixers appropriate for this software:
High Shear Batch Mixers
Can be hooked up on mobile hydraulic ground stands,
permitting one device to address the contents of a couple of kettles
Used along side an anchor stirrer/scraper
Small gadgets available for R&D and pilot production
High Shear Bottom Entry Mixers
No submerged wells – reduces cleansing wishes
Ultra Sanitary Models