Control unwanted particles without compromising the formula. Follow the process, understand the filtration duty, and evaluate the right filter for your finish.
Explore liquid coating manufacture and delivery, from incoming ingredients to the finished film. Select a process below to review filtration stages, product candidates and the evidence needed for a trial.
These are representative process routes, not universal recipes. Product links identify candidates for evaluation, not proven equivalent replacements. Filtration must preserve useful pigments, fillers and formulation properties.
Waterborne coatings • solvent feeds • additives
Liquid feeds & formulation water
Start upstream: incoming liquids can introduce rust, packaging fragments or other suspended matter before a batch is blended. Define a separate quality target for each feed; formulation water and solvent are not interchangeable filtration duties.
Process map / Liquid feeds & formulation waterFollow steps 01–06
01Identify the feedWater, solvent or liquid additive
02Dedicated storageSegregate incompatible liquids
03Selected pretreatmentOnly as required by analysis
04Particle filtrationCompatible medium and seals
05Feed verificationSample against the recipe target
06Batch chargingTransfer through a controlled line
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
Particle filters do not remove dissolved salts or establish microbial control. Water treatment, solvent purification and contamination prevention require their own design basis.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Receiving / transfer
Intercept introduced debris.
Evaluate a bag or depth cartridge after reviewing the complete liquid composition.
Formulation water
Meet the recipe’s water specification.
PP cartridges or high-flow elements can support particle control; determine separate RO/DI or microbial treatment needs.
Release to blending
Avoid carrying contamination into the batch.
Record feed quality and filter condition before accepting a change.
Process information to review
Liquid composition, conductivity where relevant, solids loading, flow, temperature, viscosity and required feed quality.
Feed analysis, material compatibility statement, selected element efficiency and pressure/temperature data.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Binder production • purchased resin • latex handling
Resins, binders & emulsions
Unwanted coagulum and gel fragments can travel with a resin or emulsion. Filtration selection must distinguish these defects from the dispersed material that gives the binder its function. A solvent-borne resin and an aqueous latex need separate trials.
Process map / Resins, binders & emulsionsFollow steps 01–06
01Qualified resin feedProduced or received binder
02Condition the batchApproved temperature and mixing
03Bulk screeningIf larger contamination is present
04Selected filtrationTest gel capture and flow
05Quality checkSolids, viscosity and stability
06Storage / let-downProtect the accepted binder
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
This map starts after the resin has been produced or received; it is not a polymerization recipe. Hot polymer melts and high-temperature resin service need specialist equipment, not an assumed PP-cartridge substitution.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Bulk contamination
Manage loading without stripping useful solids.
Bag-format candidates can be screened in small-scale compatibility trials.
Gel control
Evaluate deformable contamination.
Compare depth-filter performance using the real resin; a rigid bonded medium cannot be matched by micron number alone.
Acceptance
Preserve binder behaviour.
Compare filterability, solids and finished-film results before production release.
Process information to review
Resin identity, solvent blend, emulsion stability, viscosity at filtration temperature, gel burden and permitted shear.
Compatibility and extractables information; gel-retention trial; viscosity-dependent flow data; construction limits.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Dispersion creates the required particle distribution; filtration addresses unwanted oversize material left in the process. Set the acceptable pigment population first, especially when colour strength or effect particles are critical.
Process map / Pigment dispersions & millbaseFollow steps 01–06
01Wet-out / premixPrepare the specified millbase
02Dispersion / millingDevelop required fineness
03Mill separationRetain grinding media where used
04Dispersion checkConfirm fineness and stability
05Qualified screeningRemove unwanted oversize only
06Let-down / transferContinue the formulation route
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
A downstream disposable filter does not replace the mill’s media-retention system or correct an inadequate dispersion. Not every formulation requires milling; follow its approved manufacturing route.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
After dispersion
Identify the cause of oversize material.
Separate poor dispersion from external debris before changing filtration.
Classification trial
Retain useful pigment and effect material.
Trial suitable bag or cartridge grades on the actual millbase; compare upstream and downstream samples.
Dispersion specification; before/after pigment and colour data; captured-solids assessment; media-shedding and extractables evidence.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Final batch filtration is a quality-control step between formulation and packaging. Build the trial around the actual defect—skins, debris or unwanted agglomerates—and the coating’s intended texture and finish.
Process map / Architectural & industrial liquid paintsFollow steps 01–06
04Final filtrationSelect for the defect and formula
05Protected fillingClean transfer and containers
06Release testingRetain sample and batch record
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
Textured coatings and filled products deliberately contain larger solids. A finer filter can change the product or obstruct flow; there is no universal micron grade for all paints.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Batch preparation
Confirm the batch is ready for filtration.
Resolve formulation or dispersion problems before relying on the final filter.
Pre-fill filtration
Control unwanted solids at practical throughput.
Bags or multi-channel elements are formats to evaluate; depth or pleated cartridges require a formulation-specific comparison.
Batch release
Confirm filtration has not changed the finish.
Compare film appearance, retained solids, throughput and pressure history against the accepted baseline.
Process information to review
Water/solvent base, pigment and filler load, viscosity, batch size, target filling rate and defect history.
Grade-specific efficiency; seal fit; batch trial and film-test records; contamination-control and change-out procedures.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Transparent finishes make small inclusions easy to see. Review the source of visible specks, soft gels and haze before choosing filtration: dissolved contamination or an unstable formulation may need a different remedy.
Process map / Clearcoats, varnishes & wood finishesFollow steps 01–06
01Prepared finishApproved resin and additives
02Condition / blendMaintain specified viscosity
03Optional prefilterOnly where loading requires it
04Qualified final filterControl the identified defect
05Protected transferFill or feed the application line
06Film evaluationClarity, gloss and cure response
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
For two-component systems, review the resin and hardener separately before the specified mixing point. Any post-mix filtration needs explicit approval for pressure, residence time, pot life and cleaning.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Before final filtration
Identify visible and deformable contamination.
Test whether the chosen medium captures the defect under operating pressure.
Final polishing
Preserve optical and curing properties.
PP depth or pleated formats are candidates only when the complete chemistry, seals and extractables are qualified.
Two-component / UV systems
Avoid compromising reaction or curing.
Request a dedicated review; do not assume compatibility from “water-based” or “solvent-based” alone.
Process information to review
Resin/hardener identity, solvent composition, UV/reactive components, viscosity, temperature and clarity/cure targets.
Full wetted-material review; extractables and silicone statement; optical trial; cure and adhesion results.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Automotive • appliances • coil and metal finishing
Paint kitchens & coating application
After a batch is accepted, tanks, transfer lines and circulation can introduce fresh contamination. Review supply and return circuits separately, with point-of-use filtration specified for the applicator.
Process map / Paint kitchens & coating applicationFollow steps 01–06
01Dedicated supply tankMaintain the approved coating
02Supply circulationControl delivery conditions
03Supply-line filterQualified element and seal
04Point-of-use filterWhere the equipment specifies it
05ApplicatorSpray, roll or other approved method
06Finish inspectionAssess appearance and defects
↳ Recirculating installations: the unused delivery flow returns through the designated return circuit to the supply tank, with return filtration where specified. Applied coating does not return from finish inspection.
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
The map shows delivery logic, not a pressure-system design. Supply filters, return bags and applicator capsules have different duties and are not interchangeable.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Supply circuit
Control particles reaching the application area.
Compare the installed element with a compatible depth or pleated candidate after a coating trial.
Return circuit
Manage recirculated contamination.
Verify the exact bag size, ring, basket and required retention; a Size 2 bag is not a Size 4 replacement.
Point of use
Protect the final delivery point.
No verified PARSWOOD applicator-capsule equivalent is established here. Keep the approved component pending a documented review.
Current supply/return/point-of-use specifications; dimensional check; pigment retention and finish trial; extractables statement.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Packaging inks • digital printing • specialist coating fluids
Printing inks & functional liquid coatings
Ink manufacture and ink delivery to a printhead are separate duties. Bulk filtration addresses manufacturing contamination; a printer’s final filter must meet the equipment’s fluid, pressure and particle requirements.
03Quality releaseColour and relevant particle tests
04Protected supplyClean filling and transfer
05Printer filtrationEquipment-specific bulk / final stages
06Print verificationNozzle and output performance
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
No inkjet capsule or printhead-filter replacement has been verified from the linked PARSWOOD range. Air management and degassing are separate from particle retention.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Manufacturing stage
Remove unwanted particles without colour loss.
Evaluate compatible bag, depth or pleated formats against the specific ink; do not select solely by a catalogue grade.
On-board delivery
Meet the printer’s filtration requirements.
Retain the approved format until its efficiency, pressure behaviour and materials can be matched.
Acceptance
Confirm the printed result.
Track nozzle performance, colour and stability using the equipment’s acceptance procedure.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Adhesives and sealants share some resin-handling challenges with coatings, but viscosity and intentional fillers can dominate selection. Review them as a separate application rather than extending a paint-filter approval.
Process map / Liquid adhesives & sealantsFollow steps 01–06
01Prepared componentIdentify resin, hardener or blend
02Condition the fluidOnly within the approved window
03Contamination reviewDistinguish debris from useful filler
04Qualified filtrationIf the formula permits this stage
05Protected dispensingFollow the specified mixing route
06Bond verificationCheck output and bond performance
Teal: filtration · Gold: verification. Conceptual treatment logic; pumps, valves and protective devices are not fully shown. Not an installation drawing.
This is a liquid-component review route. Hot-melt adhesives, highly filled pastes and moisture-sensitive reactive materials need specialist evaluation; no suitable replacement is established by this guide.
Filtration stages and selection
Stage
Objective
PARSWOOD approach to evaluate
Selection basis
Determine whether filtration is appropriate.
Identify useful fillers and any components that must pass unchanged.
Pressure and throughput
Avoid selecting from water-flow data alone.
Obtain viscosity-dependent performance and element strength limits; compare with the existing approved technology.
Production trial
Protect dispensing and bonding performance.
Evaluate a compatible bag or depth candidate only after formulation approval.
Process information to review
Component identity, filler distribution, viscosity/temperature curve, reactivity, dispensing pressure and bond requirements.
Start with the linked product specifications. Request missing grade-specific data through the application review; this page does not imply that every document is already available for download.
Dry powder screening, reclaim and dust collection require dedicated systems. The liquid filter candidates in this guide are not powder-sieve or booth-filter replacements.
Removing suspended solids does not establish solvent purity or discharge suitability. Review the full treatment process and analysis before reuse.
Product fit / technical review
PARSWOOD products to evaluate
Melt-blown PP cartridges
Initial trials on compatible liquid feeds and selected particulate-removal duties.
The published efficiency table lists 85% for 1–5 µm grades and 90% for 10–100 µm grades. These are not absolute barriers. The listing gives a 65°C maximum operating temperature and 2.0 bar maximum differential pressure at 20°C; confirm the selected construction and derating.
Do not transfer the retention performance of a different depth technology to this cartridge.
Defined fine-particle control after compatibility and pigment-retention testing.
Published grades span 0.1–50 µm. The listing identifies process-water and plating-chemical applications. Obtain the test method, retention efficiency and pressure/temperature limits for the exact grade.
An “absolute” label alone does not establish an OEM cleanliness result or suitability for paint.
Batch transfer and coarse screening of compatible liquid formulations.
The listing offers PP, PET and nylon media and different seal-ring constructions. Ratings are nominal. Select the material for the actual chemistry and temperature, and verify the supporting basket and seal.
A nominal bag is not interchangeable with an absolute cartridge at the same micron number.
Capacity evaluation in a compatible bag-format process installation.
Published PP/PET constructions and nominal grades of 1–200 µm. Confirm the specific length, top plate, restrainer basket and sealing arrangement before a trial; published standard bag dimensions do not prove fit.
No service-life multiplier or direct replacement performance is promised for your fluid.
Higher-flow utility water; coating service needs separate qualification.
The listing includes several formats, nominal/absolute options and different constructions. Select one exact model; confirm dimensions, flow direction, seals and retention data before comparing it with the installed element.
Do not treat all high-flow formats as interchangeable or infer sterilization from antibacterial marketing.
Contain and seal the selected element in its operating circuit.
Confirm vessel materials, pressure/temperature rating, connections, vent/drain arrangement and element retention. Review installation space and safe change-out access.
Pressure rating, seals, cleanability and solvent-service suitability need individual confirmation.
Record the existing filter, actual flow and viscosity, clean and end-of-run pressure difference, throughput, retained solids and finished-product acceptance. Compare the candidate under equivalent conditions and agree acceptance criteria before changing production.
