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Early access · Extraction Knowledge

Know the material. Trace the manufacturer. Compare the real price.

Evidence-backed research on the materials, hardware and parts used in extraction and processing: who makes them, how they reach you, and what buyers actually pay.

Explore a category
Get early accessHow the research works

Synthetic example · fictional companies and prices

Filtration Media: schematic illustration
SourceChain illustration · schematic

Filtration Media

Example Activated Bleaching Clay B-70

25 kg multi-wall bag

Particle size
75 µm (90% passing)seller claim
Free moisture
12–14%manufacturer document
Bulk density
? Unknownnot stated

Related replacement partExample filter press plate gasketOriginal part number not yet documented◌ Not assessed

Start with the material itself: what it is, and what it is called by the people who sell it.

What we are building

Early access to an evidence-first research platform

Extraction Knowledge is in development. Early-access members will see these tools as each one is ready; none is presented here as finished.

  1. 01

    Manufacturer discovery

    Who actually makes a material or part, with the document that shows it — or an honest “unknown”.

    In development
  2. 02

    Supply-chain traceability

    Each stage from maker to seller, marked documented, candidate or unknown, with dates.

    In development
  3. 03

    Product and specification comparisons

    Grade, size, pack and certificate side by side, so like is compared with like.

    In development
  4. 04

    Historical price intelligence

    Advertised, paid and estimated prices kept on separate, dated bases.

    In development
  5. 05

    OEM replacement-part sourcing

    Find the original part number first, then see which replacements have been assessed.

    In development
  6. 06

    Evidence-backed investigations

    Neutral, sourced write-ups that state what the evidence shows and what it does not.

    In development

B · Explore materials

Four categories to start

The first research covers consumables and parts that are bought often and compared badly.

  • SOURCECHAIN ILLUSTRATIONFiltration Media, schematic illustration
    Source: Extraction KnowledgeRights: Original work

    Filtration Media

    e.g. Example Activated Bleaching Clay B-70 Synthetic example

    Research in progress · not yet published

  • SOURCECHAIN ILLUSTRATIONSolvents, schematic illustration
    Source: Extraction KnowledgeRights: Original work

    Solvents

    e.g. Example n-Heptane 99% Synthetic example

    Research in progress · not yet published

  • SOURCECHAIN ILLUSTRATIONStainless Hardware, schematic illustration
    Source: Extraction KnowledgeRights: Original work

    Stainless Hardware

    e.g. Example 1.5 in Tri-Clamp Ferrule, 304 Synthetic example

    Research in progress · not yet published

  • SOURCECHAIN ILLUSTRATIONOEM Replacement Parts, schematic illustration
    Source: Extraction KnowledgeRights: Original work

    OEM Replacement Parts

    e.g. Example Seal Kit SK-200 Synthetic example

    Research in progress · not yet published

Product photographs

Real product photos will appear only with a recorded source and rights review, and always with a label saying whose photo it is. Until then the slots stay empty rather than filled with look-alike images.

MANUFACTURER PHOTO
Source: PendingRights: Not yet reviewed
RESELLER PHOTO
Source: PendingRights: Not yet reviewed
USER PHOTO
Source: PendingRights: Contributor permission required

C · Follow the chain

Every link is labelled for what we can prove

  1. 01

    Identify the exact item

    Grade, size, pack and lot. Two products that look alike are not assumed to be the same, or to share a maker.

  2. 02

    Capture the source

    Data sheets, certificates, manuals and listings are captured with a date and a fingerprint, so they can be checked later.

  3. 03

    Label each stage

    Documented Candidate, unconfirmed Unknown

  4. 04

    Publish only what passes review

    Nothing about a real company is published without evidence, review and owner approval. Corrections are logged.

D · Price intelligence

Prices on separate bases, never blended

What buyers paid, what sellers advertise, what makers publish and what we estimate are different numbers. We show them side by side and say which is which.

Example Activated Bleaching Clay B-70, 25 kg multi-wall bag — synthetic example
BasisAmountUnitObservedComparability
Actual paid · aggregated buyer reportsMedian of independent, moderated buyer reports. Individual reports are never shown.USD 162.00range 148.00–176.00/ 25 kg bagQ3 2026 · n = 7Same grade and bag; freight excluded
Advertised retailA listed asking price on a dated capture. Not what anyone paid.USD 189.00/ 25 kg bagOct 2, 2026Same grade and bag; freight excluded
Manufacturer pricePublished by the maker. Rarely available.Unknown/ 25 kg bag—Not published
Commodity benchmarkA raw-material index. Not a product price.Unknown/ t—No benchmark mapped for this grade
Estimated landed costOur scenario estimate with stated assumptions. Shown as a range, never as a seller's cost.Est. USD 58.00–84.00/ 25 kg bagScenario, Oct 2026Estimate with stated assumptions

Read this table by row. A gap between two bases is a spread, not a profit figure. What the seller paid for the goods is unknown unless a verified invoice exists.

Paid prices over time, 25 kg bag (synthetic example) Paid, middle half of reports Paid, median Advertised retail (separate basis) Insufficient data
Paid prices over time, 25 kg bag (synthetic example)Synthetic example. Quarterly median and range of buyer-reported prices per 25 kg bag. Quarters with fewer than 5 independent reports show no value. The full data is in the table below the chart.120130140150160170180190200? n<5? n<5◇ Advertised 189▦ Paid median 162Q4 2024n=32 sellersQ1 2025n=63 sellersQ2 2025n=84 sellersQ3 2025n=53 sellersQ4 2025n=21 sellersQ1 2026n=94 sellersQ2 2026n=73 sellersQ3 2026n=74 sellersUSD
Chart data as a table
Quarterly buyer-reported prices per 25 kg bag, synthetic
QuarterReports (n)SellersPaid medianPaid rangeAdvertised retail
Q4 202432Insufficient dataNot shownUSD 172
Q1 202563USD 149138–158USD 175
Q2 202584USD 151141–163USD 175
Q3 202553USD 155146–166USD 179
Q4 202521Insufficient dataNot shownUSD 182
Q1 202694USD 158147–171USD 185
Q2 202673USD 160149–173USD 185
Q3 202674USD 162148–176USD 189

Aggregated historical observations Shown only for quarters with at least 5 independent buyers and 3 sellers (proposed threshold). The advertised line is a different basis; the distance between the lines is not a margin.

Insufficient data · 2 of 5 reports needed

We have too few independent reports for Example n-Heptane 99% to publish a paid price without risking that a buyer or seller could be identified, or that one report skews the result. No number is shown, and none is estimated in its place.

Coming soon · buyer-reported prices

Paid for a material or part recently?

Real transaction prices are the missing column in industrial pricing. We are designing a private way to share what you paid, so summaries can show what buyers actually pay, separate from advertised prices.

  • Your name is never shown
  • Only summaries of 5+ buyers are published
  • Receipts optional, reviewed privately

Not collecting yet. The preview shows the planned flow; nothing you type is sent.

Preview · Price intelligence

Share what you paid

Preview of a planned feature: nothing you type here leaves this page, and it is cleared when you reload.

  1. 1Type of price
  2. 2Product and seller
  3. 3What you paid
  4. 4Terms
  5. 5Proof and notes
  6. 6Review
Step 1 of 6: Type of price

We only collect prices from completed purchases. Quotes and listings are different records.

E · Product investigations

Neutral write-ups, sourced line by line

  • WalkthroughHow a 25 kg bag of bleaching clay reaches a retail listing Synthetic example2 documented · 1 candidate · 1 unknownOct 2026
  • Method noteComparing heptane prices fairly: purity, pack size and freight Synthetic examplePricing method onlySep 2026
  • ExplainerTri-clamp ferrules that look alike: what packaging can and cannot tell you Synthetic exampleNo shared-maker claim madeAug 2026

Titles above illustrate the format. No investigation has been published yet.

See an example product dossier

F · Find the original part

Start from the original part number

Replacement parts are compared against the original maker’s part, from its manual or parts list. A replacement is never called equivalent until it has been assessed.

Coming with early access.

SOURCECHAIN ILLUSTRATIONGeneric seal kit, exploded schematic
Source: Extraction KnowledgeRights: Original work · not a manufacturer drawing

G · Evidence and methodology

How to read our labels

■ Confirmed
Primary documents agree, with no credible contradiction.
◧ Strongly supported
Several independent sources point the same way.
□ Possible connection
Some evidence; not enough to state as fact.
? Unknown
We have not found evidence. We say so instead of guessing.

Every image says what it is

  • MANUFACTURER PHOTO
  • RESELLER PHOTO
  • USER PHOTO
  • TECHNICAL DRAWING
  • SOURCE DOCUMENT
  • SOURCECHAIN ILLUSTRATION

H · Knowledge library

Guides for buyers and researchers

  • GuideReading a certificate of analysisPlanned
  • GlossaryPrice bases: asking, paid, quoted and estimatedPlanned
  • Material guideBleaching clay grades and particle sizePlanned
  • How-toFinding the original part number in a service manualPlanned
  • MethodologyWhat 'Unknown' means on a supply chainPlanned
  • MethodologyWhy a price gap is not a profit figurePlanned

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