After the Next Price Change: PDF Catalogue vs Online Catalogue
A lighting wholesaler we have spoken with sends its trade catalogue as a PDF. Sixty-four pages, a little over nine hundred product lines, exported from the design file every February and emailed to roughly four hundred trade buyers. In March a supplier moved the price on eleven fittings. In April two ranges were discontinued. In June a lead time changed from three days to three weeks. The catalogue sitting in those four hundred inboxes still says February.
Nobody did anything wrong. The file was correct on the day it was sent. What happened afterwards is the ordinary business of a company that keeps trading: prices move, ranges are retired, a finish is added, a photograph is replaced. Each of those changes was made in the design file, and the design file is not what the buyer has. The buyer has an attachment, and the attachment is a snapshot of a day in February that has since passed.
A PDF catalogue records what was true on the day it was exported. Once it is sent, the prices, stock lines and discontinued items inside it stay where they were, and the copy sitting in a buyer's inbox cannot be corrected. An online catalogue holds one version: an edit to a product shows the next time anyone opens the page, each item keeps its own address as it changes and nobody has to be told to throw away last quarter's file. The difference shows up not in how the two look but in how quickly each one goes out of date.
What a PDF catalogue is, and what an online catalogue is
A PDF catalogue is a document. It is produced once — from a layout file, a slide deck, or a spreadsheet merged into a template — and then distributed as a copy: attached to an email, uploaded to a buyer's portal, handed over on a trade stand, forwarded onward by whoever received it. Every recipient holds their own copy, independent of every other from the moment it leaves your outbox.
An online catalogue is not a document but an application. The products live as records. Each one has a page, a page has an address, and the pages are assembled from the records every time somebody opens them. There is no distribution step, only a link. When a price changes in the record, every page that shows that price changes with it, including the one a buyer bookmarked in March.
The distinction is not about presentation. Both can carry the same photography, the same layout logic, and the same product copy. What differs is where the information lives: in four hundred separate copies, or in one place that four hundred people look at. That is the difference between a document and an application you publish once and keep editing.
The moment an emailed catalogue stops being accurate
Ask a distributor when its catalogue was last completely correct, and the honest answer is nearly always the export date. Not the year, not the quarter — the day. For the wholesaler above, the catalogue was accurate for nineteen days. The first supplier price increase landed in the second week of March, and from that morning onward the document in circulation contained eleven statements that were no longer true. By the middle of August the running count of changes made since export stood at thirty-one: price moves, two discontinuations, four new finishes, a revised lead time, and a corrected weight on a ceiling track that had been wrong since the previous edition.
Thirty-one changes across nine hundred lines is not chaos. It is a normal year for a business with suppliers. But it means the useful life of the catalogue was never twelve months. It was nineteen days at full accuracy and a slow decline thereafter, with nobody able to say from the outside how far the decline had gone.
Prices, stock lines and discontinued items after export
The three categories of drift behave differently, and they cost different amounts.
Prices
Price drift reaches a conversation quickest. A buyer builds a quote using your February figure, wins the job on that number, and sends the order. You then have two options, both of which cost something: honour a price you no longer hold, or open the conversation with a correction. Sales teams tend to absorb the first few and correct after that, which means the same catalogue produces different prices depending on who is on the phone.
Stock lines
Stock drift is quieter. A fitting shown in five finishes is now available in three. Nothing in the buyer's copy says so, and the two withdrawn finishes keep being specified, ordered, and substituted at the packing bench. Each substitution is a phone call, an amended order line, and a small dent in the buyer's confidence that the catalogue means anything.
Discontinued items
Discontinuation is the expensive one. An order arrives for a product that no longer exists. The line has to be unwound, an alternative proposed, and the quote the buyer gave their own customer revisited. The buyer is not being careless; they are reading the document you sent them, which still lists the item on page 41 with a price beside it.
Why the file in a buyer's inbox is not the file you last edited
Inside the business, the catalogue feels like one thing. In practice there are already several: the design file the studio works in, the export on the shared drive, the copy on the website's downloads page, the copy on the buyer portal, and four hundred copies in four hundred inboxes — plus however many of those were forwarded to colleagues, specifiers, and contractors.
Reissuing retires none of them. Email has no recall. A buyer searching their inbox for the word catalogue finds whichever of your files their mail client surfaces first, usually the one they opened most often rather than the one you sent most recently. The version they act on is decided by their search results, not by your publishing schedule.
This is the practical form of a broader change we have written about at more length in the shift from static files to living applications. A file is copied outward and then drifts. An application is looked at, and there is nothing to drift from.
One address per product, and what happens when it changes
In a PDF, a product's address is a page number. That address is unstable by design: insert a new range at the front and page 41 becomes page 44 at the next export. It is also unshareable in any useful way. A sales person who wants to send one buyer one product sends a sixty-four page attachment and the sentence page 41, third column.
In an online catalogue, each product has an address of its own and keeps it through every change to the product behind it. The price can move, the photograph can be replaced, the description can be rewritten, and the address stays where it is. It goes in an email, a quotation, an order confirmation, or a QR code printed beside the sample on a trade stand.
The combination matters more than either half. A stable address plus current content means a link sent in February still shows the right price in September. Having both is what turns a catalogue into a product site people can be sent to rather than a file they download.
The cost of reissuing a catalogue after every correction
The wholesaler priced its own reissue cycle once. Amending the layout for a batch of price changes took a designer half a day. Proofing took another hour, because a price list corrected wrongly is worse than one that is out of date. Export and the mailing itself took most of an afternoon between two people. Call it a day of internal time per reissue, before anyone has opened the email.
Thirty-one changes at a day apiece is not a policy anyone would adopt, so changes are batched — and batching is what creates the gap. The catalogue goes out twice a year rather than thirty-one times, and the corrections in between are carried by the sales team, one phone call at a time, at three or four minutes each.
The cost that appears on no sheet is the correction that never happens: the buyer who quoted an old price and absorbed the difference, the specifier who wrote a discontinued finish into a drawing, the customer who assumed the three-day lead time and promised it onward. Those do not arrive as calls. They arrive later, as disappointment.
The one case for a printed or fixed catalogue
There is a real one, worth naming plainly rather than arguing around. A fixed, dated document is the right artefact whenever the point is that it cannot change: a price list held firm for a quarter under a supply agreement, a tender submission where the attachment forms part of the contract, a procurement process that requires a document to be filed and referenced, a trade show where a printed catalogue is read on the train home with no connection. In each of those the fixed quality is a feature, not a defect.
The sensible arrangement is not to abandon the PDF. It is to stop treating it as the master. Keep one live catalogue as the source, and generate a dated document from it on the occasions when a dated document is required. The PDF then becomes an export with a date on the cover, which is what it always should have been, rather than the only place the product information exists.
Moving an existing deck or PDF to a browsable catalogue
Most businesses in this position are not starting from nothing. The content already exists and is already structured: a deck with one product per slide, a PDF laid out in ranges, or the spreadsheet the design file was built from.
That structure is what carries across. Sections become categories. Repeated fields — code, finish, dimensions, price, lead time, minimum order — become the columns behind every product page, which is what makes search and filtering possible afterwards. A buyer who wants brass pendants under sixty pounds with stock available gets an answer in one step rather than paging through a document.
If the existing artefact is a product deck, the route is described on the page for turning a PowerPoint product deck into a catalogue. If it is the exported document itself, converting an existing PDF catalogue into a browsable one covers the same ground from the other direction. In both cases the original file stays as it is, and the next scheduled export can go out as normal while the live version is checked internally.
A short check before the next price change
Four questions are usually enough to tell a business which of the two it should be running.
When did you last export, and how many product facts have changed since? If the answer is more than a handful, the document in circulation is already a historical record.
If a price changed this afternoon, how many people would still see the old one tomorrow morning? Count the inboxes, not the shared drive.
Can a sales person send one buyer one product, as a link, in ten seconds? If the answer involves a page number, the catalogue is not addressable.
What does a correction cost, and how often do you decide not to make one? The postponed corrections are where the drift accumulates.
None of this is about how the catalogue looks. A PDF can be beautiful, and frequently is. The change is narrower than that, and more useful: the next price change stops being an event that requires a reissue, a proofing round, and a mailing, and becomes an edit that is true for everyone the moment it is saved.
