Majestic, monumental, yet imbued with exquisite, ethereal grace, Untitled XLVIII from 1983 hails from the celebrated final series of works created by Willem de Kooning in the last active decade of his unparalleled career. Onto the massive pristine white background of Untitled XLVIII, as tall and wide as the span of de Kooning's outstretched arms, the artist has floated a series of delicate sinuous lines and planes that evoke the influence of Matisse's abstract cutouts, with their use of brilliant pure colors and elegant contour lines. The buoyant strokes of de Kooning's abstract calligraphy are utterly sensual, seemingly free from any specific reference to human or landscape subjects that dominated de Kooning's work of the prior five decades. To compliment the fluidity of these cascading lines, de Kooning opted for a reduced and lyrical palette; nowhere is his ability as a colorist more poetically asserted than in these late masterpieces. Exuding ease, poetry, technical finesse and groundbreaking innovation, Untitled XLVIII epitomizes de Kooning's life-long investigation into line, color and form, culminating in the radical transformation of his remarkable practice.

The 1980s announced a period of renewed activity in de Kooning's creative output, heralding a new era of artistic production. By 1980, de Kooning had moved full t.mes to East Hampton. Completely transforming his working method, he eschewed the thick impasto which characterized his earlier works, moving towards a singular elegant sensuousness evocative of Matisse's vibrant cutouts and a consummate simplicity that recalls Mondrian. Describings de Kooning's technique in his late paintings, Carter Ratcliff observed: "Something extraordinary happens in the 1980s. Dragging a wide metal edge through heavy masses of paint, de Kooning turns scraping into a kind of drawing. A process of subtraction makes an addition, a stately flurry of draftsmanly gestures. De Kooning has always layered and elided his forms. Now he reminds us that he does the same with his methods" (Carter Ratcliff, "Willem de Kooning and the Question of Style", in Willem de Kooning: The North Atlantic Light, 1960-1983, Amsterdam, 1983, p. 22).

Notably, paintings executed from 1983 onwards exemplify de Kooning's ultimate shift towards the use of thin evanescent layers of primary colour. The diaphanous fluidity and rhythmic suppleness of de Kooning's wrist here carves its way across the composition in meandering ribbons of vibrant red and broad flowing swathes of rich yellow. De Kooning channeled his wealth of creative experience into emotive construction by filtering the countless stylistic changes and compositions of the preceding decades into a radically distilled fusion of line and color. Enveloping the viewer with its vast, exhilarating visual plenitude, the present work reveals an artist that has reached a serene relationship between his body, the paint and the canvas.

Much like the late work of Pablo Picasso, de Kooning's late paintings contain the sustained energy and technical finesse of earlier achievements, and return to the grandly lyrical manner of de Kooning's Cubist abstractions of the 1940s. The compositions of the 1980s such as Untitled XLVIII are extremely sympathetic with the biomorphic silhouettes of the black and white abstractions such as Orestes (1947), and the color palette bears a resemblance to the acidic yellows, oranges and reds of works such as Fire Island (1946). However, filtered through the experiences and paintings of the intervening decades, most notably the sun and light-filled East Hampton landscapes, the content of these paintings has been radically simplified and illuminated, their composition distilled into pure color and line. The frenetic pace of the works of the 1940s gives way to a more layered and contemplative matrix of linear and organic forms executed with confidence and authority. The composition is almost a magnification of a detail of the earlier works, now expanding beyond the edge of the canvas surface.

The poetic quality of de Kooning’s late paintings signifies the technical finesse of the artist’s earlier achievements and return to the grandly lyrical manner of de Kooning's abstractions of the 1940s. Although entirely abstract, de Kooning’s Untitled XLVIII reveals clues from the sun and light-filled East Hampton landscapes distilled into pure color and line. The evanescent feathering of paint across this monumental canvas attests to the peerless technical prowess of one of the most revered American artists of the past century. An endless expanse of ribbon-like brushstrokes and suave riptides of color collide against de Kooning’s robust Abstract Expressionist gesture, the immediacy of which is never lost, even among the billowing and contoured forms of Untitled XLVIII. Unlike many of the artist’s peers who turned to darker or moodier styles toward the end of their lives, at the age of seventy-five, de Kooning radically shifted his artistic focus to create clear, elegant compositions emanating unprecedented luminosity. Untitled XLVIII's uplifting composition reveals an artist who has finally reached an enlightened balance between his mind, body and materials. It clarifies something of the vital character of his art and has the same qualities that had initially brought him renown as an Abstract Expressionist – an insistence on invention, freedom and risk.

《無題 XLVIII》作於1983年，當年德庫寧的藝術修為已臻化境，此畫將他在巔峰時期全力創作的心血全部濃縮其中。作品尺幅宏偉，畫布的大小是德庫寧伸開雙臂所能觸及的高度和寬度，潔白的背景上舒展著清雋秀逸的線條和色塊，用色素淨，曲線優美婀娜，喚起觀者對馬蒂斯抽象剪紙的想像。德庫寧以抽象筆法揮灑出輕靈曼妙的線條，從之前五十年的作品裡大量的人體或風景形態中抽離出來，撩撥觀者感官。為了襯托線條的流暢姿態，德庫寧使用了淡雅、寫意的色彩。這種富含詩意的馭色造詣，在他後期的作品中表現得最為讓人折服。

評論家卡特・拉特克里夫（Carter Ratcliff）如此形容德庫寧後期的繪畫技巧：「八十年代發生了令人嘆為觀止的事情。德庫寧用寬闊的金屬刮刀邊緣擦過大片的顏料，將刮擦變成一種繪畫形式。這種減省步驟的做法卻額外衍生出恢弘穩重的筆觸。德庫寧習慣把簡略的形態互相重疊起來。而現在他表明自己同樣在使用簡略、互疊的方法進行創作」（卡特・拉特克里夫，〈威廉・德庫寧與風格〉，《威廉・德庫寧：北大西洋之光，1960-1983》，阿姆斯特丹，1983年，頁22）。本作以富有質感的表面和活潑的線條，創造出一片視覺盛景，將觀者身心籠罩其中，同時反映藝術家已經領悟出自己的身體應該與顏料、畫布安然共處的心境。德庫寧將畫筆運用得彷如行雲流水，溫柔的流轉間飽含韻律，每道痕跡都蘊藏著藝術家身體的節奏，叫人歡欣鼓舞，一氣呵成的寬闊筆觸長長地劃過畫面，生機盎然的紅色與明黃躍動不息。他把過去幾十年無數的風格嬗變和構圖仔細過濾，萃取出線條和色彩，把豐沛的創意淬煉成一幅充滿感染力的作品。

一如畢加索後期的作品，德庫寧後期的繪畫包含了早期作品中綿延的力量和精湛的技巧，並回歸至四十年代立體主義抽象所展示的華麗抒情風格。包括本作在內，德庫寧八十年代的作品喜用1947年《俄瑞斯忒斯》中黑白色擬生物形態的抽象輪廓，以及與1946年《火燒島》中銳利的黃色、橙色、紅色近似的色調。然而，對照他在四十至八十年代的創作，尤其是刻畫陽光普照的東漢普頓的風景畫，德庫寧大刀闊斧地簡化了當中的內容，剩下純粹的顏色和線條，並把構圖調得更加明亮。四十年代熱情奔放的足音逐漸遠去，取而代之的是更有層次、更加沉靜的線條和有機形態，流露出創作者的自信與權威風範。本作幾乎可以說是早期作品局部的放大，在邊界以外，延伸著看不見的風景。

德庫寧八十年代的作品雖然帶有抽象本質，但是他在開始創作時留下來的筆跡通常都顯示出人體的形態。面對空白一片的畫布，德庫寧會感到不安；他在畫布上迅速勾出記號，再將它們覆蓋，開始畫圖。在八十年代的作品中，他把這些記號當作定位和移位的原始標誌，然後以線形圖案描出和凸顯這些記號。畫作即將完成時，他會減少顏色和線條的數量，採用大量白色構成簡單的基面，把紅、黃等彩色顏料覆蓋並模製出特殊的形態。觀眾很難分辨白色的顏料底下是否裹藏著其他顏色。本作的構圖給人一種明亮樂觀的感覺，可見藝術家終於在身、心與媒材之間取得豁然開朗的平衡。它使德庫寧作品中的某些重要元素變得更加明晰，並且擁有一開始令他躋身為抽象表現主義大師的特質——即對創造、自由與冒險的堅持。