Selecting the right anilox roll is an important part of achieving consistent ink transfer and predictable print quality in flexographic printing. The wrong specification may contribute to poor color density, excessive ink laydown, weak coverage, or inconsistent results between production runs.
Two commonly discussed parameters are LPI and BCM. LPI describes the engraving line count, while BCM expresses the volume of the engraved cells. These parameters work together, but neither should be selected in isolation. Ink formulation, plate characteristics, substrate, press speed, and the required print appearance all influence the final choice.
For printing companies purchasing new rolls or replacing existing equipment, understanding these relationships can help make technical discussions with suppliers more productive.
LPI stands for lines per inch and describes the engraving line count on the roll surface. BCM, or billion cubic microns per square inch, is a unit used to express cell volume. Cell volume is an important factor in determining how much ink the engraved surface can carry and potentially transfer.
In general, higher LPI with relatively low cell volume is often considered for fine graphics and process printing. Lower LPI with higher volume may be suitable for applications requiring heavier ink laydown, such as some solid-color or coating jobs.
These are broad selection principles rather than fixed rules. Two rolls with the same LPI may not produce the same results if their cell volume, cell opening, engraving geometry, or surface condition differs.
When reviewing an Anilox Roll, buyers should therefore consider the complete engraving specification, rather than relying on line count alone.
The required print result should guide the initial specification.
Fine process printing and halftones: Higher line counts with controlled cell volume are often considered for fine image reproduction. The objective is to transfer sufficient ink while maintaining detail and controlling dot gain.
Lines and text: The required line width, plate characteristics, ink behavior, and substrate all influence the selection. A specification that performs well for one combination may not perform equally well on another press or material.
Solid colors and heavy coverage: Greater cell volume may help deliver the required ink laydown. However, excessive transfer can affect edge definition, consistency, and drying or curing behavior.
Opaque white: Higher volume may be appropriate for some applications, but opacity also depends on pigment characteristics, formulation, substrate, and transfer efficiency. Selecting a high-volume roll alone does not guarantee the required hiding power.
Varnishes and coatings: The desired coating weight, material viscosity, surface finish, and cell geometry should guide the selection. Coating applications may need different specifications from conventional process inks.
General reference charts can help identify possible starting points. However, the final choice should be confirmed with the ink supplier and tested under representative production conditions.
Not necessarily. Different ink formulations may behave differently during transfer, drying or curing, and interaction with the substrate.
Water-based inks must be evaluated according to their formulation, viscosity, pigment concentration, substrate, and drying conditions. Printing on paper or corrugated board may require a different balance of coverage and detail from printing on non-absorbent film.
UV inks require consideration of their rheology, pigment properties, curing conditions, and required coverage. Solvent-based inks must be evaluated in relation to formulation, substrate compatibility, press conditions, and the required print result.
Specialty inks require additional attention. Pigment particle size and cell opening can influence ink release, while unsuitable conditions may contribute to plugging or inconsistent transfer.
The correct approach is to select the roll for the complete application—not simply for the ink category. Where a printing line also uses other types of rollers, the functions must be clearly distinguished. A Gravure Roll serves a different printing process, while Coating Rolls are relevant to suitable coating operations. These products are not direct substitutes for anilox rolls.
Before requesting a quotation, prepare the information needed to establish compatibility and performance expectations.
Printing press model and application.
Roll diameter, face length, and overall dimensions.
Existing LPI and BCM, if available.
Ink or coating type and relevant material characteristics.
Substrate and target print quality.
Current issues, such as low density, poor transfer, or inconsistent coverage.
Required inspection criteria and available documentation.
If an existing roll is underperforming, first investigate its condition. Cell wear, plugged cells, cleaning practices, ink condition, and press setup may all influence performance. Changing the LPI or BCM without identifying the cause may not solve the problem.
A controlled print trial or banded-roll test can help compare candidate specifications. For repeat jobs, maintaining records of the ink, plate, substrate, press conditions, LPI, BCM, and print results supports more consistent future production.
The condition of other press components should also be considered. For example, CI Impression Drums are relevant to registration and print stability on applicable central-impression presses, although they perform a different function from anilox rolls.
A supplier comparison should cover more than price and nominal LPI. Buyers should review specification clarity, equipment compatibility, inspection arrangements, documentation, delivery terms, and technical communication.
Before confirming an order, agree on the dimensions, LPI, BCM, engraving characteristics, and applicable acceptance criteria. Where inspection data are available, clarify what is being measured and how the results will be documented.
It is also useful to evaluate a supplier's wider industrial roller experience. The HUATAO Rolls website provides an entry point to its industrial roller product information, while the About HUATAO page offers company background. Buyers should confirm the actual supply arrangement and project-specific technical capabilities for each order.
HUATAO GROUP provides industrial roller solutions for printing, packaging, and converting applications. Project information can be reviewed to discuss a suitable solution, subject to technical evaluation and confirmation of the required specifications.
The best anilox roll LPI and BCM combination depends on the complete printing application. Fine process printing, solid colors, opaque white, and coatings can have different requirements, and ink chemistry alone is not enough to determine the specification.
By reviewing LPI, cell volume, engraving geometry, substrate, press conditions, roll condition, and test results together, buyers can make better-informed selection and replacement decisions.
Related Products and Resources
Contact
Tony Liu
General Manager | International Department
Mobile / WhatsApp / WeChat: +86 13383112591
E-mail: sale08@huataogroup.com
Website: https://www.huataorolls.com/
can not be empty
can not be empty
HUATAO GROUP - ROLLS
Address: No.298 Zhonghua North Street, Shijiazhuang 050000 China.
Tel: +86 0311 80690567
Email: sale08@huataogroup.com
WhatsApp & WeChat : +86 13383112591