7 Ways to Reduce Contamination in Cleanrooms

Reduce Contamination in Cleanrooms

A cleanroom bears its name for a reason: its very purpose is to stay sanitary and free of contaminants to maintain a stable work environment. Because employees handle sensitive equipment and components in these critical areas, keeping contaminants at bay is essential to everyday workflow, and ultimately, maintaining profitability.

It may come as no surprise that your employees are the most common source of contamination in your cleanrooms. What you may find surprising, however, are the simple steps you can take to minimize contamination risks. Let’s take a look at some of the most effective tips, below.

1.       Practice Good Hygiene

Practice Good Hygiene
Practice Good Hygiene

Humans naturally produce particles. Our bodies shed contaminants, producing detritus like skin flakes and particles from hair products, cosmetics, and lotions. Thus, while good hygiene can limit the level of contaminants spread in the cleanroom, it’s also important to consider ways in which certain steps of getting ready might be skipped or altered for the purpose of limiting contaminants. Even perfume and cologne, for instance, can produce contaminants. Since 75-80% of particles found in cleanroom inspections are produced by personnel, it’s a good idea to establish a set of hygiene recommendations for your employees to follow.


2.       Be Especially Mindful of Hands

TechniGlove Nitrile Cleanroom Glove
TechniGlove Nitrile Cleanroom Glove

A good portion of cleanliness violations result from bare hands touching surfaces, then transferring these particles onto garments before they enter the cleanroom. To make sure your employees aren’t contaminating anything that will be worn inside your critical environments, consider installing no-touch sensors in the areas where your employees don their cleanroom gear. This will allow them to still wash their hands without picking up any excess particles in the process. Cleanroom Gloves are used in areas that have specific requirements for low contamination risk.

Cleanroom Gloves are disposable gloves designed and clean-processed for contamination control and sterility required work environments including cleanrooms, laboratory and ESD work areas. Minimize sub-micron particle contamination by using gloves designed and manufactured for Cleanrooms.

3.       Don Gear Properly

Don from Top to Bottom
Don from Top to Bottom

The way your employees put their disposable apparel on is just as important as the garments themselves. Because particles are also impacted by the pull of gravity, donning procedures should start at the top. Employees can then work their way down. While each company’s donning procedures may be unique to its specific needs, it’s a good idea to adopt a head-to-toe procedure to prevent contaminants from falling and settling on clean shoe covers.


4.       Limit Speaking

Limit Speaking
Limit Speaking

A quiet cleanroom doesn’t just boost productivity; it also has the power to reduce contaminants. Consider the fact that loud speaking of just 100 words (less than a minute of normal conversation!) can produce up to 250 particles of saliva. Of course, there are also some contaminants which may not be avoided, such as coughs and sneezes, which produce roughly 5,000 and 1,000,000 saliva particles, respectively. What’s a simple way to limit contamination from saliva particles in your cleanroom? Wear a face mask designed for Cleanrooms.

5.       Designate “Cleanroom Only” Supplies

Cleanroom Pens
Cleanroom Pens

Taking a pen from outside the cleanroom into the critical work environment might seem harmless, but employees who do so will also unintentionally bring a plethora of contaminants inside with it. Not only should you have cleanroom pens, cleanroom notebooks, and any other tools or instruments designated specifically for cleanroom use only, but you should also make sure they’re compliant with your standards. In other words, the supplies you’re using should also have been produced in a cleanroom environment.

Cleanroom paper packaged in class 10 cleanrooms, for instance, is considered safe for use in class 10 cleanrooms or higher. Cleanroom paper products are impregnated and coated with a polymer. This keeps the paper from generating tiny particulates when written on. Keep your area clean of paper contaminants by using documentation designed just for Cleanrooms.

6.       Take Care When Entering & Exiting

Take Care When Entering & Exiting Cleanrooms
Take Care When Entering & Exiting Cleanrooms

After employees enter and exit cleanrooms, encourage them to take an extra moment to ensure doors are tightly shut. It’s a good practice to make sure the door leading to the changing room is also closed before the cleanroom door is opened to prevent additional particles from making their way into the buffer area. In fact, you can further eliminate the spread of contaminants by separating your gowning room into three distinct areas. One for the non-sterile space directly outside of the room, where employees can keep personal items and clean shoes. The second space is the sterile “dirty” area, where employees prepare for gowning. Finally, the last space should be designated for gowning and taking final preparations before entering.

7.       Move Slowly

Move Slowly in Cleanrooms
Move Slowly in Cleanrooms

The more rapidly movement occurs inside the cleanroom, the more particles will be given off. To combat excess contamination, employees should move slowly and deliberately as they approach work stations. They should also be encouraged to enter and exit cleanrooms slowly.


By incorporating these tips into your cleanroom protocol, you might be able to significantly reduce the number of contaminants inside. You can find cleanroom documentation, cleanroom disposable apparel, and more supplies suitable for cleanroom use online through Harmony Business Supplies. If there’s a specific item you need help with, a product specialist will be happy to assist you.

Harmony Business Supplies

The 4 Most Common Cleanroom Contaminators

The 4 Most Common Cleanroom Contaminators

Maintaining a cleanroom environment has unique challenges because it’s constantly being exposed to a number of contaminants. To stabilize your company’s particle count, identifying your leading sources of contamination is critical. While these sources may vary from one organization to the next, the most common contaminators tend to be similar across most industries.

Here, we discuss four of the most widespread culprits of contamination in cleanroom environments, along with strategies for combating each source:

Cleanroom Operators: While they’re likely the most highly-trained on reducing contamination, operators actually tend to be the leading source of it in cleanroom environments. Employees can compromise your particle count by neglecting to wear the required disposable apparel to maintain your cleanroom environment. Consider how an operator who just left the building for their lunch break might contaminate an environment by neglecting to wear the proper shoe covers, face masks, or other protective apparel. Frequent reinforcement of procedures, coupled with availability of necessary disposable resources, can help to prevent contamination by operators.

HVAC Systems: Inadequate air volume or velocity can impact your environment, exposing it to a rising number of particles. Even if your cleanroom is stable, it’s possible that HVAC systems working below capacity could be pulling in particles from nearby non-cleanroom environments and contaminating your critical areas. To prevent HVAC-related contamination, make sure you’re following the prescribed maintenance schedule for your HEPA filters. A general rule of thumb to follow is to have your pre-filters replaced at least twice per year.

Supplies: Wipes, gloves, and other cleanroom supplies can either help or hurt you in controlling contaminants. If you’re not using the proper shoe covers, for example, you could actually be increasing ESD risks instead of limiting them. The same goes for the gloves and wipes you select. Make sure that the supplies you choose are intended for use in your cleanroom level. For instance, wipes made from a polyester/cellulose blend are ideal for cleaning spills in controlled environments, and many are available for environments of varying classes. There are contaminant-reducing gloves designed specifically for cleanrooms. Using cleanroom documentation, such as paper and notepads, intended for use in cleanrooms is also helpful for reduce particle generation.

Cleaning Procedures: Maintaining a regular cleaning schedule is imperative in cleanrooms, and without strict adherence to procedures and schedules, your risk for contamination increases substantially. In addition to scheduling airborne particle counts, regular inspections should also be performed on work surfaces and in critical places. Also, while general cleanings should be performed frequently, you should also be following a schedule of deep cleanses to keep particle and bacterial counts down.

From cleanroom pens to wipes and apparel, Harmony Business Supplies has everything you need to help control contamination in your company’s cleanroom. Check out our extensive selection of particle-reducing products.

If You Run A Cleanroom, Here’s How Harmony Fits In


Cleanroom Supplies from Harmony

At Harmony Business Supplies we know that cleanrooms require special attention and products when it comes to maintaining the operation of your controlled environment. If you run or manage a cleanroom, we offer great products designed just for use in cleanrooms of all types.

Disposable Apparel for Cleanrooms

Many cleanroom operations are moving to disposable apparel instead of resource heavy laundered apparel. Disposable apparel eliminates laundering costs and maintenance and still provides comfortable and reliable protection. Harmony supplies cleanroom face masks, cleanroom isolation gowns, lab coats & frocks, coveralls, and shoe covers that are all disposable, easy to use, and reliable.

Cleanroom Disposable Gloves

Available in assorted materials, our selection of Cleanroom Gloves are fit for any cleanroom job. 9-12 inches long cleanroom gloves in nitrile or latex and in assorted colors, you’re sure to find the disposable glove for your cleanroom needs. Our Cleanroom Gloves are also available in sterile or non-sterile. Leading brands of cleanroom gloves such as V-Clean, TechniGlove, and Cranberry, at lower prices.

Adhesive Mats For Cleanrooms

Adhesive Mats and Rollers for Cleanrooms are essential in controlling dust and dirt in cleanroom and other controlled environments. Harmony Business Supplies offers cleanroom mops, adhesive roller film, adhesive roller handles, and adhesive mats for cleanrooms in assorted sizes. Stop dirt in its tracks with our Adhesive Mats!

Cleanroom Documentation

Office Supplies and documentation are different for Cleanrooms and clean environments. Our specially designed cleanroom notebooks and cleanroom paper are coated and impregnated with a polymer. This coating keeps the paper from generating particles and contaminating the cleanroom. If you need a latex coating we have these products as well. Keep your area clean with our selection of cleanroom documentation, cleanroom paper, and cleanroom pens designed just for Cleanrooms.

Swabs for Cleanrooms

Swabs and Applicators in the Cleanroom are often required tools. Make sure you only get the highest quality swabs for work in cleanrooms. Harmony’s selection of cleanroom swabs are from top brands like Chemtronics, Huby, Puritan and TekniSwab to ensure quality, performance, and reliability. We have many different swab materials to choose for controlled environments including knitted polyester swabs, microfiber swabs, foam swabs, ESD swabs and cotton swabs in a wide assortment of sizes.

Cleanroom Polyethylene Tape

Polyethylene Tape for cleanrooms are used to seal and label safely in a controlled environment. Low Particulate, contaminant free tape wound on a clean plastic core and individually packaged in heat sealed bags in Class 100 environment. Polyethylene Cleanroom Tape has less particulates and higher adhesion than vinyl tapes and leaves no residue when removed.

Cleanroom Wipers

High Quallity Wipers are a must in Cleanrooms! We offer only top quality cleanroom wipers with features that our customers care about. Whether you need cleanroom wipes in materials like polyester, microfiber, or poly/cellulose, we have what you need for the job. Pre-saturated alcohol wipes are also extremely handy in cleanrooms. Shop our assortment of quality cleanroom wipes and save with our competitive prices.

If you need cleanroom supplies, we can help.

Contact us today (800-899-1255) for even more information on finding the products you need for your cleanroom or controlled environment.