Most posts on TurtleTales.eco are about what our HuskMade product range delivers — the wash cycle ratings, the BRSR Scope 3 emissions case, the operational reliability across our 390+ B2B customer base. This post is about something different. This is the inside-TurtleTales engineering perspective on IS 9845 — what the test methodology actually involves operationally, what our engineering team did to qualify our rice husk bio-composite formulations against the regulatory limit, and what the documentation we publish to buyers actually contains.
If you arrived here as a procurement professional evaluating bio-composite drinkware vendors and want to understand what IS 9845 documentation should look like at procurement-grade depth, this post is calibrated for you. If you arrived as a consumer wanting to understand why TurtleTales' safety claim is defensible, this post explains the engineering substance. If you arrived as an investor or category-watcher, this post gives you a view of how a category-stage Indian bio-composite vendor operationalises safety rigour.
Why IS 9845 was non-negotiable
When TurtleTales started building the HuskMade product range in early 2024, the first procurement question we encountered from B2B buyers was not about cost, not about wash cycles, not about BRSR Scope 3 reporting. It was about safety. Specifically: what regulatory framework certifies that this bio-composite material is safe for hot beverages in our office pantry or hotel HORECA service?
The answer had to be IS 9845. Any other answer would have failed procurement-grade scrutiny. Corporate procurement teams writing supply contracts cannot accept a generic 'food safe' label or a manufacturer's assurance. They need a documented regulatory test pass under standardised methodology by an accredited testing laboratory. IS 9845 is that framework for India. There is no shortcut.
So we treated IS 9845 as a hard requirement before any commercial rice husk drinkware product could enter our range. The product line did not launch B2B sales until the formulations had passed IS 9845 migration testing at 100°C. This was the operational discipline that separated TurtleTales from the early-2020s bio-composite drinkware vendors who launched product without documented food-safety testing and then had to retrofit safety documentation after procurement teams demanded it.
The engineering journey
Passing IS 9845 at 100°C is not automatic. The 60 mg/kg total migration limit is set conservatively by the Bureau of Indian Standards to ensure consumer safety, and bio-composite formulations have to be engineered carefully to stay within that limit at the more aggressive test temperatures.
Our engineering journey to IS 9845 pass involved formulation iteration. Our initial coffee-colour VintageBrew formulation did not pass IS 9845 at 100°C on the first test. The total migration exceeded the regulatory limit, which meant the formulation was not certified safe under the test methodology and could not be sold under a defensible safety claim. The honest framing is that the first formulation failed. We pulled the formulation, returned it to the engineering team, and re-engineered.
The re-engineering process worked across several variables in parallel. Binder ratio — the proportion of food-grade binder to rice husk fibre — was systematically adjusted across multiple trial formulations. Processing parameters in the thermal moulding stage — temperature, dwell time, pressure profile — were calibrated against migration outcomes. Additive packages — compatibilizers and other formulation supports — were tested in different combinations. Each formulation iteration was tested again under IS 9845 methodology to measure the impact on migration outcome.
The formulation that ultimately passed IS 9845 at 100°C did so comfortably within the 60 mg/kg regulatory limit. That formulation is now the production specification for our coffee-colour VintageBrew range and the foundation for the rest of the HuskMade product line. The engineering work behind that pass is now locked in our production process specifications and reproducibility documentation, which is reviewed and re-tested at scheduled intervals to ensure no specification drift.
The honest framing is that our engineering team did the work other vendors might have skipped or compressed. The result is a product range with documented IS 9845 pass at the demanding 100°C test condition — not the easier 70°C condition some vendors test at and report as 'passed IS 9845' without specifying the temperature.
What our IS 9845 documentation actually contains
Our IS 9845 documentation set, available to B2B procurement teams on request and summarised in our product specification sheets, contains the elements procurement teams should expect to see from any credible bio-composite drinkware vendor.
Test conditions specified in detail. Temperature (100°C), duration (2 hours), food simulants used (distilled water, 3 percent acetic acid as relevant), sample preparation methodology, and exposure protocol. Procurement teams can confirm the test was conducted under the more demanding conditions, not the easier ones.
Test date and laboratory accreditation. Tests are conducted by accredited laboratories and documented with date stamps. Procurement teams can confirm the test is recent and the testing laboratory is independently credentialled.
Measured migration values. Actual measured migration in milligrams per kilogram of food simulant, documented against the 60 mg/kg regulatory limit. Procurement teams can see the operational headroom, not just the pass/fail.
Sample identification. Which specific product SKU and formulation batch was tested. Procurement teams can confirm the tested formulation matches the formulation being procured, not a generic or substituted version.
Re-test cadence. We re-test our production formulations at scheduled intervals to confirm no specification drift. Procurement teams can confirm the test is current and the formulation has not changed since testing.
What we test beyond IS 9845
IS 9845 is the foundational migration test, but it is not the only safety framework we operate under.
IS 10910 compliance for the food-grade binder. Our binder selection complies with IS 10910 requirements for polypropylene and its copolymers in food-contact applications. This addresses the compound-identification question that IS 9845 (which measures total migration without identifying specific compounds) does not directly cover.
Accelerated wash cycle testing. Our rice husk cups are rated for 2,000+ dishwasher cycles without meaningful surface degradation. This addresses the cumulative long-term exposure question that single-exposure IS 9845 testing does not directly answer.
Thermal cycling testing. Cups are tested across repeated thermal cycles from cold storage through hot serving temperature and back to ambient. This stresses the bio-composite at the thermal-stress conditions of real shared pantry and HORECA use.
Drop impact testing. Cups are tested under controlled drop conditions to characterise failure modes and confirm that intact cups do not develop micro-cracks that could compromise safety over time.
None of these supplementary tests replace IS 9845 as the foundational safety certification. They complement it. The full safety story is documented IS 9845 pass plus food-grade binder compliance plus operational durability testing across the realistic service envelope.
How to evaluate our documentation as a buyer
Three procurement-grade evaluation patterns we recommend buyers apply, not just to TurtleTales but to any bio-composite drinkware vendor making safety claims.
First, ask for the actual test report, not just the pass certificate. A pass certificate is a single line of text. A test report contains the test conditions, methodology, measured values, lab accreditation, and date. Vendors who can produce the test report on request are operating at procurement-grade documentation rigour. Vendors who can only produce a pass certificate or a summary are operating below that standard.
Second, confirm the test temperature explicitly. IS 9845 specifies different test conditions for different intended food contact applications. 100°C testing is the demanding condition for hot beverage drinkware. 70°C testing is the easier condition for less demanding applications. Vendors who claim 'passed IS 9845' without specifying the temperature condition may be reporting a 70°C pass on a product intended for hot beverage service. Ask for the temperature explicitly.
Third, confirm the formulation tested matches the formulation being procured. Vendors with multiple product SKUs may have tested one formulation and applied the pass to the entire product range, or may have tested under specific conditions that do not match the procurement use case. Ask for sample identification on the test report and confirm it matches the SKU being procured.
Three next steps depending on your starting point
If you are a procurement professional evaluating bio-composite drinkware vendors and want our IS 9845 documentation set for evaluation, request it directly via the documentation request form on the contact page. We respond personally with the full documentation package — test report, lab credentials, formulation specification, and re-test cadence — within three working days.
If you are a corporate sustainability head or HORECA procurement team writing a 2026 supply contract and want the procurement-grade framework for evaluating IS 9845 documentation across multiple vendors, Edition #4 of The HuskMade Memo (live now) covers the multi-vendor evaluation criteria, three vendor documentation patterns, and three forward-looking signals for the safety certification landscape.
If you are a consumer buyer evaluating our products for personal use, the HuskMade VintageBrew, TurtleBrew, PebbleBrew, HuskChai, and ArborCraft lines are available on the product range page. All product specification sheets include the IS 9845 pass summary. Detailed documentation is available on request via the contact page.
Three next steps:
1. Procurement teams — request full IS 9845 documentation set via the documentation request form. [Documentation request link]
2. Subscribe to The HuskMade Memo Edition #4 for the multi-vendor procurement-grade IS 9845 framework. [Subscribe link]
3. Browse the HuskMade product range. [Product range link]
Written by Nipun Jain, Co-founder and CEO of TurtleTales. We make rice husk bio-composite drinkware in Bengaluru. HuskMade product range passes IS 9845 migration testing at 100°C within the 60 mg/kg regulatory limit, with IS 10910 food-grade binder compliance. Full documentation available to B2B procurement teams on request. turtletales.eco