Black Paramagnetic Spheres and Micropsheres 10micron to 1.4mm

Black Paramagnetic Microspheres

Black polyethylene paramagnetic microspheres are now available in wide selection of particle sizes ranging from 10 micron to 1.4 millimeters. The particles are supplied in dry powder form. No solvents are used in the manufacturing process. Black paramagnetic polymer microspheres have a strong response to magnetic fields and can be manipulated with a magnet. Highly … Read more

Custom Janus Particles, Microspheres, Microbeads – Bichromal Particles

Custom Janus Particles - Ceramic

What are Custom Janus Particles? Janus particle is anisotropic and refers to a particle, typically of spherical shape, with two hemispheres which may vary in color, optical properties, surface tension, electrostatic charge, magnetic response, conductivity, fluorescence, reflectivity and more. Custom Janus Particles Manufacturing Cospheric LLC uses a patented process to offer a unique capability of … Read more

Calculating microspheres per gram

During scientific experiment design and analysis it is common to need to know the number of spheres per gram of dry material. We have put together the table below to help speed up the process.

Magnetic Microspheres – New Size Ranges Offered

Cospheric announces new particle size ranges for its BKPMS, Paramagnetic Microsphere product.

Thanks to customer demand for narrower particle size ranges of paramagnetic microspheres. Cospheric has added the following sizes to its extensive inventory of microspheres offered in the dry powder form:

Microspheres in Medical Devices – MDDI Magazine

What are Microspheres?

The Microsphere of Influence

Published on MDDI Magazine
By: Yelena Lipovetskaya

Why Use Microspheres in Medical Devices?

Properties of Microspheres - Composition
Microspheres in Medical Devices

Microspheres are round microparticles that typically range from 1 to 1000 micron in diameter. Benefits of microspheres in medical devices, pharmaceuticals, and cosmetics are well known due to the microspheres’ ability to encapsulate and deliver active materials. However, there are many other lesser known advantages and functionalities of using micropsheres in medical device design, quality control, manufacturing, and testing.

The typical manufacturing process involves the microencapsulation of a drug or an active cosmetic ingredient to protect it from the deteriorating effects of the environment or for optimal release and performance in the final product. Active ingredients are released by dissolution of the capsule walls, mechanical rupture (rubbing, pressure, or impact), melting, or digestion processes. The resulting particles are often called microcapsules, which are different from solid, non-deformable microspheres.

Solid microspheres are widely used as fillers and spacers in a variety of industries. Microspheres that are used to manufacture and test medical devices are typically solid particles that are made from robust and stable raw materials such as polymers, glass, and in some cases, ceramics. Different types and grades of microspheres are available and selected based on specific application requirements.

Solid microspheres in medical devices are often used as tracers and challenge particles. In these situations, it is beneficial to use larger microspheres with sphere diameters greater than 50 micron that are vividly colored (red, blue, black, yellow, or green), since they provide contrast with the background material and visibility to the naked eye in daylight.

Colored microspheres are typically used in the testing of filtration media and systems, vial and container cleaning evaluations, flow tracing and fluid mechanics, centrifugation and sedimentation processes, pharmaceutical manufacturing, and contamination control.

Fluorescent microspheres are recommended for applications that require the use of particles that emit distinctive colors when illuminated by UV light and offer additional sensitivity for observation through the use of microscopes, lasers, and other analytical methods. Examples include microcirculation and biological research, imaging, and flow cytometry. Fluorescent microspheres can be excited and detected by a wide range of methods and are useful as experimental particles for acoustical and optical analytical systems.

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ParaMagnetic Microspheres

These highly spherical polyethylene microspheres offer the flow-ability of standard microspheres, with the ability to be separated from other materials for re-use and cleanup.