Question 1

What is the Pentel Ain-C28 0.9 mm HB lead, and what is it best used for?

Accepted Answer

Pentel Ain-C28 0.9 mm HB leads are designed for smooth, dark lines and durable performance. They come in a swivel-top case for quick refills and are ideal for technical drawing, headings, labels, and everyday writing.

Question 2

What does 0.9 mm HB mean for writing and drawing quality?

Accepted Answer

The 0.9 mm diameter produces fuller, darker lines that are easy to read, while the HB hardness balances darkness with a degree of smoothness—great for precise lines without excessive breakage.

Question 3

What is the C28 formula and how does it affect performance?

Accepted Answer

The C28 formula is designed to deliver smooth output with strong tips, helping reduce lead breakage and providing consistent, dark lines when used in 0.9 mm pencils.

Question 4

What does 'clean erase' mean with these HB leads?

Accepted Answer

Clean erase indicates that HB graphite erases predictably with standard erasers, leaving clean margins and minimizing smudges for neat drawings and writing.

Question 5

How does the swivel-top refill mechanism work and how do I use it?

Accepted Answer

The swivel-top case allows quick loading: twist the cap to reveal the dispensing area and slide or push a new lead into the pencil. It’s designed for fast, tidy refilling without fumbling.

Question 6

What are the contents and lead compatibility of this pack?

Accepted Answer

The pack contains 36 leads. They are compatible with most 0.9 mm mechanical pencils, making it a convenient refill option for standard 0.9 mm devices.

Question 7

Which pencils are compatible with Ain-C28 0.9 mm HB leads?

Accepted Answer

These leads fit most 0.9 mm mechanical pencils. If your pencil accepts standard 0.9 mm leads, Ain-C28 leads should work reliably.

Question 8

How do I install a new lead into a 0.9 mm mechanical pencil?

Accepted Answer

1) Remove the old lead if present. 2) With the pencil cap off, insert a new 0.9 mm lead into the advance mechanism. 3) Gently push the lead until it seats. 4) Test by lightly pressing to extend the lead and begin writing.

Question 9

What are common use cases for these leads?

Accepted Answer

Ideal for technical drawing, schematics, architectural diagrams, clear headings and labels, and everyday writing where a dark, readable line is helpful.

Question 10

How should I store and care for these leads to maximize durability?

Accepted Answer

Keep the leads in the swivel-top case when not in use to prevent bending or breakage. Store in a cool, dry place and avoid applying excessive pressure to the leads.

Question 11

Are there safety or compliance considerations I should be aware of?

Accepted Answer

Graphite leads are generally non-toxic and safe for everyday use. Keep them away from small children to prevent choking hazards and avoid ingestion. Use as intended in mechanical pencils.

Pentel Ain-C28 Mechanical Pencil Leads, 0.9 mm, HB, Smooth Flow & Strong Grip, Dark Strokes, Ideal for Technical Drawing & Writing - 36 Leads

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Specification

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