Jesmonite Alternative in India: An Honest Look at CALSO ONE

If you have searched for a jesmonite alternative in India, you are doing the kind of homework most studio owners skip. Jesmonite is genuinely good material and the global reference standard for water-based casting resins. It is also priced at roughly ₹900 per kilogram through its Indian channel, and the two-part workflow has a learning curve that not every studio wants to climb on day one.

I'm Anirudh, and I started Artriso to give Indian makers a more accessible option in the same category. CALSO ONE is not a replacement for Jesmonite, and this guide is not going to tell you it is. It is, plainly, a more affordable, easier-to-use Indian-made alternative for makers who want a serious eco resin without the Jesmonite price point or the two-part workflow.

Here is the honest case for it.

Why this question keeps coming up

Three years ago "jesmonite alternative" had almost zero search volume in India. Today it is a weekly conversation in studio WhatsApp groups. The shift happened for two reasons.

First, the Indian resin art market grew up. Makers moved from epoxy keychains to coasters, trays, sculpture, lamps, branded decor, and small-batch interiors. The work got bigger, the casts got more frequent, and per-piece resin cost became a real line item on studio P&Ls.

Second, two-part chemistry is not the easiest place for a new maker to start. Jesmonite is powder plus a separate acrylic liquid in a 2.5 to 1 ratio. The ratio is precise, the liquid has its own shelf life once opened, and a mismeasured pour ends in landfill. For studios that already run a tight Jesmonite workflow this is fine. For newer studios and teaching studios, a simpler single-component starting point is often a better fit.

CALSO ONE is that starting point. Jesmonite remains widely available in India through its official channel for makers who want the global reference standard.

What jesmonite actually is, in one paragraph

Jesmonite is a brand name for a family of water-based composite materials, originally developed in the UK in the 1980s as a safer alternative to fibreglass and gypsum. The most common formulation for resin artists is AC100: a mineral powder mixed with a proprietary acrylic liquid in a 2.5 to 1 ratio. It cures by chemical bonding into a hard, mineral-finish piece. It is genuinely well-engineered material and the reason this entire product category exists. The question on this page is not whether Jesmonite is good. It is whether it is the right first choice for every Indian studio.

The price picture, with numbers

Here is the per-kilogram price comparison at the pack sizes Indian studios actually buy.

At a 1 kg trial pack, CALSO ONE Off White lands at roughly 55 percent of the Jesmonite per-kilo price. At a 15 kg studio pack, the same shade is closer to 46 percent. Brilliant White, our higher-purity option, still comes in meaningfully below Jesmonite at every pack size.

For a studio buying 8 kilograms of material a month, the annual difference on resin alone is in the range of ₹40,000 to ₹50,000 depending on shade choice. That is real working capital that can fund better moulds, a part-time hire, or the next product line.

Meet CALSO ONE

CALSO ONE is a single-component, water-based acrylic casting powder. You add water in a 3:1 ratio by weight. That is the entire kit. No second bottle, no liquid component, no acrylic dispersion to keep fresh on a shelf.

It is manufactured in Hyderabad and shipped from our facility in Telangana. Orders leave the warehouse the same business day and reach most Indian metros in two to four days at standard courier rates.

Two studio-grade shades are live. CALSO ONE Off White is the most-ordered colourway, with a warm-neutral base most studios calibrate their pigment recipes against. Brilliant White is the higher-purity option for makers who want a cooler, cleaner base for pastel pigments. Both shades sit in the CALSO ONE collection and ship in 1 kg, 3 kg, 6 kg, 9 kg, and 15 kg packs.

If you want the deeper material explanation before going further, the what eco resin actually is primer covers the chemistry without jargon.

Side-by-side: CALSO ONE vs Jesmonite AC100

This is the comparison most people search for, so here it is in plain terms. Both products belong to the same water-based eco resin category. The differences below are factual, not value-loaded.

For a more detailed workflow comparison, see our Artriso vs Jesmonite head-to-head. For a comparison with the other Indian-made eco resin in market, we have compared CALSO ONE to Beyond Mix.

Where Jesmonite is the right call

This page is written by a competitor of Jesmonite, so it is worth being clear about where Jesmonite is the right product to buy.

Jesmonite is the global reference standard in this category, and that matters. Studios with a Jesmonite-trained customer base, interior designers asking for the brand by name, or makers who have already invested in a deep stock of Jesmonite-specific pigment recipes are not buying just chemistry. They are buying a brand the market already trusts. CALSO ONE does not match that brand position today, and pretending otherwise would be silly.

Jesmonite's two-part chemistry also delivers a cast with a feel and finish character that experienced makers genuinely prefer for some applications. If you are working with a recipe that has been dialled in over years on AC100, the smart play is usually to keep going with what works.

Where the choice opens up toward CALSO ONE is the studio looking for a more affordable starting point, a simpler single-component workflow to teach in classes, or an Indian-made option from a founder-led brand with direct support.

Who CALSO ONE is built for

I will not pretend every Jesmonite buyer in India should switch tomorrow. What I can describe is the three studio profiles we see ordering CALSO ONE most often.

The high-volume coaster and tray studio. They cast 200-plus units a month and they need the per-piece resin cost to make sense at their retail price point. CALSO ONE meets that brief while keeping the matte mineral finish their customers expect.

The teaching studio. Workshops need predictable costs and a workflow that can be taught to first-time pourers in a single session. Single-component, just-add-water, is easier to teach than a two-part system. The lower per-kilo price also makes a six-person class materially cheaper to run.

The new studio. Founders launching a resin practice for the first time often pick CALSO ONE because the learning curve is shorter, the 1 kg trial pack at ₹499 lets them validate their first cast cheaply, and they are not switching costs trapped in an existing brand commitment.

How to get a clean first pour

If you decide to try CALSO ONE, here is the honest first-pour guide.

Order a 1 kg pack first. One kilogram is enough for ten to fifteen coasters or one mid-size tray. Do not commit a studio order until your first pour is in your hand. The 1 kg pack at ₹499 (Off White) or ₹699 (Brilliant White) is designed exactly for this test.

Calibrate your ratio. CALSO ONE is 3:1 powder to water by weight, not by volume. Use a digital kitchen scale. This is the single most common first-pour mistake.

Mix for 60 to 90 seconds. Continuous, no air-folding. The slurry should be smooth, the texture of thick paint. If it feels gritty, you have not mixed long enough.

Pour within 8 minutes. Pot life is 12 to 15 minutes in a Hyderabad-temperature room. Cooler rooms give you slightly longer.

Demould at 45 to 60 minutes for thin casts, longer for thicker pours. Full cure is 24 hours.

Test your pigments. Existing Jesmonite pigment recipes are a starting point, not a final answer. Off White reads slightly warmer than AC100 at the same pigment load. Brilliant White reads cooler and closer to AC100. Adjust by eye on a small test card before committing a production batch.

What about epoxy resin, isn't that cheaper?

Epoxy is cheaper per kilo, but it is not a fair comparison. Epoxy is solvent-cured, releases VOCs during pour and demould, requires PPE you cannot skip, and the finished piece behaves very differently: glassy, plasticky, yellows over time. CALSO ONE and Jesmonite both cure water-based, have negligible VOC, can be poured indoors safely with basic ventilation, and produce a matte mineral finish that is the defining look of the modern Indian resin studio. The choice between CALSO ONE and Jesmonite is between two products in the same category. The choice between either of them and epoxy is between two different categories entirely.

Why we built CALSO ONE the way we did

A short note on philosophy, because it matters when you choose what to put your studio's name on.

Single-component was the design choice from day one. The point was not to claim a workflow win over Jesmonite, it was to lower the entry barrier for Indian makers who want a serious eco resin but do not want to start with a two-part system on their first pour.

Made in Hyderabad was a deliberate choice too. Indian buyers should not pay an imported-product premium for studio-grade casting material when the chemistry can be made well, locally, at a working studio price.

The pricing was set to do one thing: at every pack size, sit meaningfully below Jesmonite's per-kilo price in India, with the gap widening for studios buying at scale. The table further up is what fulfilling that brief actually looks like.

That is the entire thesis. Not better than Jesmonite. More accessible. Easier to start. Made in India. Honestly priced.

So, is CALSO ONE the right jesmonite alternative for you?

If you are a working studio in India, casting regularly, looking for either a more affordable option in this category or a simpler single-component workflow, the answer is likely yes. Order a 1 kg test pack, run your standard pieces on it, and judge on your own bench.

If you have already invested in a Jesmonite-trained workflow that works for you, stay with what works. Switching for the sake of switching is rarely the right call in a studio that is already shipping good work.

The point of building CALSO ONE was never to displace Jesmonite. It was to give Indian makers a serious second choice in the same category, at a more accessible price point. That choice now exists.

Frequently asked questions

Is CALSO ONE the same as Jesmonite?

No. CALSO ONE and Jesmonite are different products from different manufacturers. They are in the same category: water-based, mineral-loaded casting materials that cure to a matte finish. CALSO ONE is single-component, mixed 3:1 with water by weight. Jesmonite AC100 is two-component, mixed 2.5:1 with a separate acrylic liquid. The cured pieces look similar once finished. Workflow and price differ meaningfully.

How much cheaper is CALSO ONE than Jesmonite in India?

Jesmonite retails at approximately ₹900 per kilogram in India. CALSO ONE prices range from ₹413 to ₹699 per kilogram depending on pack size and shade. At the 1 kg pack, Off White is around 55 percent of the Jesmonite per-kilo price. At the 15 kg pack, the same shade is closer to 46 percent. The gap widens with pack size.

Can I use my existing Jesmonite moulds with CALSO ONE?

Yes. CALSO ONE pours into the same silicone moulds you already use for Jesmonite. There is no chemical incompatibility. Demould times are similar, in the 45 to 60 minute range for typical coaster and tray thicknesses. You do not need to re-tool your mould library.

Will my Jesmonite pigments work with CALSO ONE?

In most cases, yes. Pigments designed for water-based acrylic resins are interchangeable across the two. You will likely need to slightly adjust your pigment loading because the base white reads warmer (Off White) or cooler (Brilliant White) than AC100. Run a small test card before committing to a production batch.

Is CALSO ONE food safe?

CALSO ONE in its raw, uncoated state is not certified food-contact. Most studios using it for coasters and trays apply a food-safe sealer or position the products as decor. This is the same posture studios take with Jesmonite. If direct food contact is critical to your application, neither product is the right base material in its uncoated form.

How long does CALSO ONE last in storage?

Unopened, twelve months from manufacture. Once opened, keep the bag sealed tightly in a dry room. Indian monsoon humidity is the main enemy of any dry casting powder, and we package in resealable bags to make this easy. Batch and best-before dates are printed on every pack.

Where is CALSO ONE manufactured?

In our facility in Hyderabad, Telangana, India. Orders ship from there directly to your address. There are no intermediate distributors. Most Indian metros receive their order within two to four business days.

What if I'm not satisfied with CALSO ONE?

Order a 1 kg trial first. If it does not perform on your bench, write to us at contact@artriso.com and we will make it right. The trial pack exists exactly for this purpose: prove the product on your own moulds before committing to a studio order.

Anirudh Rapole is the founder of Artriso, the Hyderabad-based studio behind CALSO ONE, India's water-based eco resin for casting. Questions about whether CALSO ONE fits your studio workflow? Email contact@artriso.com or message us on Instagram @artriso.materials.