我感謝 @Mark P 和 @mhosken 提供的詳細回答。作為 PTXprint 的新手,我以前也曾經忽略過現有的功能。因此,在我手動處理我們對出血(bleed)的需求之前,我想先確認一下。現在我會遵循他們的建議,手動進行計算,並透過增加邊距以及在檔案中添加個人註記來解決這個問題。
如果這個論壇有標記問題為「已解決」的功能,那麼這個問題可以標記為「已解決」。
記錄在案:我詢問的是名詞「出血」(bleed),而不是動詞。@mhosken 反問:「你需要對什麼進行出血處理?」就這個情況而言,答案是「沒有可見的內容」。這是印刷廠的要求,我們需要在 PDF 中提供一個比「最終頁面尺寸」四周各多出 3 毫米的區域。當我使用 Scribus 時,有一個功能,他們在英文介面中將該區域稱為「bleed」。
為了完整性:在德語中,對於可用於背景照片或背景顏色區域等設計元素、超出最終頁面尺寸並意在生產過程中裁切掉以獲得乾淨結果(不露白)的區域,有幾個技術術語。
我查了一下:使用的術語是 "Beschnittzugabe"、"Beschnittrand"、"Beschnitt" 或 "Anschnitt"。 當我將這些術語輸入 DeepL Pro 時,它給出的是 "Bleed allowance"、"Bleed margin"、"Bleed" 和 "Printed edge",且大小寫並非我所加。我們需要一本關於印刷、設計和出版的技術詞典,以確保我們能在國際間溝通而不產生誤解。我手邊沒有這樣的詞典,抱歉。
我也查了一下關於「印刷廠通常希望有裁切標記」與我所述「我知道……不希望有裁切標記」的問題。我們兩方都是對的:歐洲的印刷廠不希望客戶提供裁切標記。他們會根據許多參數自行進行版面配置(impagination),然後才在需要時添加裁切標記。如果你想閱讀關於此主題的整頁內容,這裡有一個連結;你當然可以自動翻譯它:
關於對位標記(registration marks)的資訊頁面
相關資訊是這句話(他們使用 "registration marks" 作為通用術語,包括實際的對位標記、裁切標記,以及摺線標記和色樣):
然而,在 WIRmachenDRUCK,你不需要在這方面做任何事,因為我們在印刷前會自動在你的印刷檔案中添加必要的對位標記。
還有一個後續問題關於薄紙(< 50 g/m²)。[你有沒有注意到,在這個論壇回答問題時,你看不到之前的任何回答?這不太方便。] 我們從未需要使用這種紙張,所以我不知道。但我為你查了一下:
歐洲的印刷運作方式,對於像我們項目這樣的低預算客戶,功能和額外選項不是全局性的,而是在網頁介面上「依產品」顯示。因此,由於我們的印刷廠提供約 400 多個產品組和約 60,000 種可能的變化,我無法輕易地進行一般性查詢。
如果我們將範圍縮小到「小冊子,硬皮封面,CMYK 四色印刷,80 頁內容」,他們提供的最薄紙張是 90 g/m²。如果你看看他們的機器,並記得他們每天生產約 25,000 個訂單,你可能會明白為什麼特殊的精緻紙張不太適合他們的業務和目標客戶。

我目前對 PTXprint 的理解是(有一個關於其優勢的不錯影片),它使項目能夠在幾個階段生產自己的紙本版本。用於(社群)測試、鼓勵、或針對特定部分的小眾受眾。看來 PTXprint 的使用者主要不是專業排版人員,他們的工作不是為商業印刷準備完整的聖經版本。如果我理解錯了,請糾正我。如果你準備的是少於 500 頁的部分,例如「大衛的故事」或「詩篇」,除非你想訓練受眾處理這種紙張,否則沒有必要額外付費購買薄紙,並製作一本使用特殊紙張的較為精緻的書。
我很高興在這個論壇上有人提到一家專門從事聖經生產和薄紙的特定公司(我記得是在荷蘭);但那離我們目前的需求以及我關於如何在 PTXprint 中處理出血的問題很遠。
看到「在商業世界中,金錢往往有助於鼓勵優先順序」這句話時,我不得不微笑。非常真實。我們不在那個層級。「在聖經世界中,金錢往往有限。」我曾分享過,無論我們想要或做什麼,我們價格範圍內的印刷公司都不會為我們的請求或需求改變他們的工作流程。他們確實有合理的客戶服務。例如,如果你需要額外快速的交付,或者他們犯了錯誤,或者客戶犯了錯誤,你通常可以聯繫到真人並找到雙贏的解決方案。但我們永遠無法改變超出他們提供產品範圍的任何技術方面,即使我們願意支付雙倍費用。我們需要找到一家傳統的小型印刷廠,我想跨洲際聯繫這些印刷廠比較困難;不確定他們現在如何進行客戶互動。
希望這些交流對其他使用者有所幫助。這超出了 PTXprint 的操作範圍。不過,該工具的名稱中仍有「print」(印刷),我想並非所有輸出都是在本地雷射印表機上完成的。問候。
I thank @Mark P and @mhosken for their detailed answers. It has happened to me before, that I had overlooked an existing feature in PTXprint, as a new user. So I wanted to be sure, before I arrange our need for a bleed manually. I will now follow their advice and will manually do the math and will solve the need with extra margins and with personal notes in my files.
So this question can be marked as "solved" if this feature is available on this forum.
For the record: I was asking for bleed as a noun, not as a verb. @mhosken has asked back "what are you needing to bleed?" And for this case, the answer is "nothing visible". It is a requisite of the print-shops that we provide in our PDF an area of extra 3 mm all around our "final page size". When I use Scribus there is a feature, and they are calling that area "bleed" in the English-language-GUI.
To be complete: In German, there are several technical terms for the area that is available to design elements like background-photos, or background-color-areas beyond the final page-size; with the intend to cut off this area during production and have a clean result without any white showing.
I looked it up: The terms used are "Beschnittzugabe", "Beschnittrand", "Beschnitt" or "Anschnitt". When I feed these terms into DeepL Pro, it gives me "Bleed allowance", "Bleed margin", "Bleed", "Printed edge" and the capitalization is not mine. We would need a technical dictionary for printing and design and publishing to make sure that we talking internationally without misunderstandings. I do not have one available, sorry.
And I also looked up the issue of "printers tend to want crop marks" versus my statement of "I know that ... do not want crop marks". We are both right: The printers in Europe do not want the crop marks from their customers. They do their own impagination, depending on many parameters and only then do they add crop marks if and as needed. If you want to read an entire page about this subject, here is a link; you can certainly auto-translate it:
An information page about registration marks
The pertinent information is this sentence (they are using "registration marks" as a generic term, including the actual registration-marks, crop marks, as well as folding-marks and color-samples):
At WIRmachenDRUCK, however, you don’t have to do anything in this regard, as we automatically add the necessary registration marks to your print files before printing.
And there was a follow-up question about thin paper (< 50 g/m²). [Have you ever noticed that you cannot see any of the previous answers, when you answer a question in this forum? Not very helpful.] We have never needed such paper, so I did not know. But I went and had a look for you:
The way printing works in Europa, for the low-budget customers like our project, is that features and extras are not global, but get displayed on the web-interface "as per product". So since our print-shop is offering some 400+ product groups and some 60000 possible variations, I cannot easily look that up in general.
If we filter this to "small books, with hard cover and 4/4 color in CMYK and 80 pages content" then the thinnest paper they are offering is 90 g/m². If you look at their machines, and if you remember that they produce some 25000 orders per day, you might see why special delicate paper is not so suited to their business and target-customers.

The way I have understood PTXprint so far (there is a nice video about the benefits) is that it enables projects to produce their own paper-versions of projects at several stages. For (community)testing, for encouragement, for niche-audiences for portions. Seems that the users of PTXprint are not mainly professional typesetters whose job it is to prepare entire Bible-editons for commercial print-runs. Correct me, if I got that wrong. If you prepare a portion with less than 500 pages, for example "The story of David" or "The Psalms" there is no need to pay extra for thin paper, and to have a rather delicate book with special paper, unless you want to train an audience to handle such paper.
I was glad that on this forum there was mention of a special company (I believe in the Netherlands) who specialize in Bible production and thin paper; but that is far from our present need and from my question about how to handle bleed in PTXprint.
I had to smile about the wisdom of "In the commerical world, money tends to help encourage priorities." Very true. We are not playing in that league. "In the Bible world, money tends to be limited." I had shared that whatever we want or do, the print-companies in our price-range will not change their workflow for our requests or needs. The do have reasonable customer service. For example if you need extra quick delivery or if they made a mistake, or if the customer made a mistake, you can typically reach a real human being and find a solution that is win-win. But we can never change any technical aspects beyond their offered product-range, even if we wanted to pay double. We would need to find a classic small-print-shop, and those are less easy to contact intercontinentally, I guess; not sure how they operate their customer-interaction these days.
Hope that some of this exchange is useful to other users. It goes beyond the handling of PTXprint. Still there is "print" in the name of the tool, and I guess that not all output is done on local laser printers. Greetings.